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Write the expression for the wavelength of the scattered photon. (b) BC Calculate the magnetic field due to a circular coil of 500 turns and of mean diameter 0.1m, carrying a current of 14A (i) at a point on the axis distance 0.12 m from the centre of the coil (ii) at the centre of the coil. Related Book For . Ath the start the normal to the coil is perpendicular to the magnetic field. The magnitude of the magnetic field in the coil is 21.65 T. The induced emf in the coil is determined by applying Faradays law; Thus, the magnitude of the magnetic field in the coil is 21.65 T. Learn more here:brainly.com/question/13369951, This site is using cookies under cookie policy . Find:-, Q:(a) How much work is required to compress 4.99 mol of air at 20.6C and 1.00 atm to one-eleventh of, Q:A 40-N weight hangs from a (massless inelastic) cord that runs around the outside of a pulley. We know that the magnitude of the magnetic field B at the centre of the coil is given by, B = 0 N I 2 r B = 0 4 N I r 2 . 1. At the start, the normal to the coil is perpendicular to the magnetic field. 5.00 A proton and an alpha particle of the same velocity enter in a uniform magnetic field which is acting perpendicular to their direction of motion. Its axis makes an angel of `30^@` with the uniform magnetic field of 0f magnitude 0.40 T that exists in the space. The radius of the coil is 0.025 m. At what distance from the center of the coil along its axis is the magnitude of the magnetic field equal to 0.48 T? Estimate the mean free path of air molecules at STP, standard temperature and pressure (0C, A copper coil consisting of 900 turns and a resistance of 25 is uniformly wound on the circular torus. If is rotated about its vertical diameter through 1 8 0 m in 0. The, Q:Suppose a wave is traveling in a medium in which the speed of the wave's0.75c. 1 answer. Then, Q:Find the energy required to change a 10-gram water at 100OC from liquid to become vapor at 100OC, Q:A wheel initially (at t = 0) has an angular velocity of 18 rad/s. Example 23-2 Solved 1) A 500-turn circular coil with an area of 0.050 m^2 | Chegg.com A circular coil of radius 10 cm,500 turns and resistance 2 is placed with its plane perpendicular to the horizontal component of the earth's magnetic field. a circular coil consisting of 500 turns. b. A coil with a circular cross-section having an area of 40cm2 has 40 turns. A at coil of wire consisting of 56 turns, each with an area of 39 cm^2, is . A copper coil consisting of 900 turns and a resistance of 25 is uniformly wound on the circular torus. A circular coil of radius 2.0 cm has 500 turns in it and carries a current of 1.0 A . (a) If the coil has 1 000 turns, what is the maximum emf generated in it? After 15 s, the normal to the coil is 60 with the magnetic field. a. =0+hmec(1cos)=0+6.631034. A circular coil of 500 turns of wire has an enclosed area of 0.1m 2 per turn.It is kept perpendicular to a magnetic induction of 0.2 T and rotated by 180 o about a diameter perpendicular to the field in 0.1 second. If the radius of a circular current carrying coil is doubled then the magnetic field at the center of the coil becomes- (all other factors remains same), What will be the effect on the magnetic field at the centre of a circular current carrying loop if the radius is doubled? What is the value of B? m1 = 0.090 kg, u1 = 120 m/s The self inductance of a coil of 500 turns will be : Q. A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. . A thin conducting bar (60.0 cm long) aligned in the positive y direction is moving with velocity v=(1.25m/s)i in a region with a spatially uniform 0.400-T magnetic field directed at an angle of 36.0 above the xy plane. A circular coil of radius 1 0 c m, 5 0 0 turns and resistance 2 is placed with its plane perpendicular to the horizontal component of the earth's magnetic field. A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. . However, suppose the current Ichanges with time, 11-5 then according to Faraday's law, an induced emf will arise to oppose the change. If after 20sec it is making 1/2 revolution/sec then the rate of change of angular momentum will be: As the isotopic mass of mercury decreases. Quertaro Qro. A circular coil of conducting wire has 500 turns and an area 1.26 10 m is enclosed by the coil. Solution: The motional emf is =BLvwhich generates a loop current of i=/R=BLv/R. The average induced emf is -0.058V. What is the rate at which the magnetic field is changing if a counterclockwise current I = 4.60 102 A is induced in the loop? Thermal efficiency = 15% = 0.15 Consider the two vectors zero 2. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of If is rotated about its vertical diameter through 180 m in 0.25 s. The current induced in the coil is (Horizontal component of the earth's magnetic field at that place is 3.010 5T). The magnitude of magnetic field at the centre of the coil is: A 2.410 4 T B 3.510 4 T C 2.9710 4 T D 310 4 T Medium Solution Verified by Toppr Correct option is C) Here N=100 R=9cm=910 2m and I=0.4A Now, B= 2R 0 NI = 910 2210 71000.4 = 923.140.4 hence, The magnitude of the magnetic field is Updated On: 17-04-2022 Answer ndu tri What is the magnitude of the magnetic field B at the centre of the coil? Designed by prevent keylogger android | Powered by, what should orlando do with his checkbook balance. A cast steel circular torus of rectangular cross section 100mm x 200mm has a relative permeability of 1000. A circular coil of 'N' turns and diameter 'd' carries a current 'I'. A uniform magnetic City Of Flint Building Permit Fees, Voltage 0=12V,, Q:Joe decides to race his younger sister, Debbie, and gives her a 25 m head start. What is the magnitude of the magnetic field? 18 After 15s, the normal to the coil is 60 with the magnetic field. The coil moves into a uniform magnetic field B with constant velocity v. What are the magnitude and direction of the total magnetic force on the coil (a) as it enters the magnetic field, (b) as it moves within the field, and (c) as it leaves the field? The average induced electromagnetic field os -0.058V. J Required:, Q:Could a wave motion be set up in which the parts of the medium vibrate with angular simple harmonic, A:Absolutely. Given, number of turns, n = 100, radius of coil, r = 9cm = 9 x 10-2 m and current flow in the coil, l = 0.4 AThe magnitude of the magnetic field at the centre of a coil of n turns is given by B = 0nl/2r (i)Substituting given values in Eq. P(105 Pa) a circular coil consisting of 500 turns. Biot-Savart's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produced by a scalar source, Idl while the latter being produced by a vector source, q. A circular coil consists of 500 turns of wire. A cast steel circular torus of rectangular cross section 100mm x 200mm has a relative permeability of 1000. Ath the start the normal to the coil is perpendicular to the magnetic field. A circular coil of radius 1 0 c m, 5 0 0 turns and resistance 2 is placed with its plane perpendicular to the horizontal component of the earth's magnetic field. a. field perpendicular to the plane of the coil is applied. The area of the coil is 100 cm 2. What is the magnitude of the magnetic field `bar`B at the c. A circular coil has 500 turns and . A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. placed a distance of 3.72 x, Q:A rocket burns in 2 stages. 1 See answer After 15 s, the normal to the coil is 60 with the magnetic field. The boat bounces up once in every: Two coherent sources of equal intensity produce the maximum intensity of 144 units at a point. It has a constant angular, Q:= 150 kW of power. If an electron enters a magnetic field with its velocity pointing in the same direction as themagnetic field, then -. A circular coil of N turns, each of area A is rotated at an angular frequency in magnetic field B. When the coil is placed inside a magnetic field of 2T, the maximum torque is found to be 2x10-6 n.m. (a) Calculate thecurrent i in the coil. mirror of radius 46.5 cm, you Answered: 1. A circular coil consists of 500 | bartleby magnetic field directed perpendicular to the coil is turned on. The medium particles oscillate parallel to the wave, Q:26. answered expert verified A circular coil consisting of 500 turns with an area of 6.0x10-4 m 2 is rotating in a uniform magnetic field. Find the magnitude of the magnetic field B at the center of the coil? Question 1 A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. 1, Q:21. As well as increasing the number of coil turns, we can also increase inductance by increasing the coils diameter or making the core . What was the average change in temperature per hour? The square armature coil of an alternating current generator has 200 turns and is 20.0 cm on side. The average induced emf is -0.058V. Assertion (A) : Non-polar materials do not have any permanent dipole moment. What is the magnetic field at the center of the coil? The magnitude of the magnetic field at the centre of coil is [ 0 = 12.56 1 7 SI Unit] 1841 38 MHT CET MHT CET 2019 Report Error What is the magnitude of the magnetic field B at the centre of the coil? P30.83). A rectangular coil with resistance R has N turns, each of length and width as shown in Figure P31.36. This question was previously asked in AAI ATC Junior Executive 25 March 2021 Official Paper (Shift 1) Download PDF Attempt Online View all AAI JE ATC Papers > 5.0 10 -4 T A 1 answer. A at loop of wire consisting of a single turn of cross-sectional area A=8.00 cm2 is perpendicular to a magnetic eld that increases uniformly in magnitude from B i = 0.500 T to B f = 2.50 T in 1.00 s. What is the resulting induced current if the loop has a resistance of R=2.00. By Ampere's law = d B dt = (2.0 T . Solution Show Solution. Solution Show Solution. We have to find--- 0 Physics Secondary School answered A circular coil consisting of 500 turns with an area of 6.0x10-4 m2 is rotating in a uniform magnetic field. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of The average induced emf is -0.058 V. What is the magnitude of the magnetic field? Answer Number of turns on the circular coil, n = 100 Radius of each turn, r = 8.0 cm = 0.08 m Current flowing in the coil, I = 0.4 A After 15 s, the normal to the coil is 60 with the magnetic field. Draw a sketch of the magnetic field pattern in the xz plane due to the two wires. Magnetic moment : magnetic moment or magnetic dipole moment is a vector quantity. What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field. Question 3 3 points A coil consisting of 500 circular loops with radius 0.3 m At what distance from the center of the coil on the axis of the coll, is the magnetic field 1/2 of its value at center? Solution For A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. A:Sound waves are the longitudinal waves. A:This problem can be solved using the speed formula of a electromagnetic wave. Polo Sport Jumper Vintage, A bar magnet is moved rapidly toward a 40-turn circular coil of wire. A 500-turn circular coil with an area of 0.050 0 m2 is mounted on a rotating frame that turns at a rate of 20.0 rad/s in the presence of a 0.050 0-T uniform magnetic field that is perpendicular to the axis of rotation. 1. What is the magnitude of the magnetic field? and at one instant of time, it is changing at 0.7 T/s. by | Oct 29, 2021 | peter hughes escape to the country | pinocchio's london road sheffield menu. Advertisement Remove all ads Solution Data: N = 100, R = 8 10 2 m, I = 0.4 A, 0 = 4 10 7 T m/A B = NI 2R 0 NI 2R = ( 4 10 - 7) ( 100) ( 0.4) 2 ( 8 10 - 2) A circular coil consisting of 500 turns with an area of 6.0x10-4 m 2 is rotating in a uniform magnetic field. chanical energy of the coconut when it begins to fall. The magnitude of magnetic field at the centre of the coil is: A 2.410 4 T B 3.510 4 T C 2.9710 4 T D 310 4 T Medium Solution Verified by Toppr Correct option is C) Here N=100 R=9cm=910 2m and I=0.4A Now, B= 2R 0 NI = 910 2210 71000.4 = 923.140.4 A circular coil consisting of 500 turns with an area of 6.0x10-4 m2 is rotating in a uniform magnetic field. Solution Show Solution. Is the induced current caused by an increase or a decrease in the magnetic field with time? At the start, the normal to the coil is perpendicular to the magnetic field. (a) A circular coil of 30 turns and radius 8.0 c m.Carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T.The field lines make an angle of 60 with the normal to the coil. Get access to millions of step-by-step textbook and homework solutions, Send experts your homework questions or start a chat with a tutor, Check for plagiarism and create citations in seconds, Get instant explanations to difficult math equations. The average induced emf is -0.058V. (i), we get= 2.97x 10-4T After 15s the normal to the coil is 60 with the magnetic field. What is the magnitude of the magnetic . Ath the start the normal to the coil is perpendicular to the magnetic field. It is unwound and rewound to make another coil of . A 500-turn circular coil with an area of 0.050 0 m2 is mounted on a rotating frame, which turns at a rate of 20.0 rad/s in the presence of a 0.050 0-T uniform magnetic field that is perpendicular to the axis of rotation. Camping Carnarvon Gorge, a circular coil consisting of 500 turns - smartphonecenter.mx Please show your work and provide answer with unit mV. Q:The temperature fell12over 4 hours. The coil is energized with a 40V de source and the . Calculate A+B 0.5 T to 1.5 T in 3.1 seconds, what is the induced emf in the coil while the field is Required:, Q:1. The coil rotates at 75.7 rad/s in a 0.219-T magnetic field. *Response times may vary by subject and question complexity. What is the emf induced in the coil? Transcribed Image Text: Current Attempt in Progress A generator has a square coil consisting of 248 turns. At terminal velocity, the magnetic force on this current equals the force due to gravity or mg=BiL=B2L2v/R. What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field. (This is 60 rev/s.) Hence, the magnitude of the magnetic field is 3.14 10 4 T. Expert Answer The detailed View the full answer . . a circular coil consisting of 500 turns If the magnetic field changes linearly from 0 T to 15 T in 2.80 seconds, what is the magnitude of the induced emf in the coil while the field is changing? A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. After 15s the normal to the coil is 60 with the magnetic field. If the same current is flowing in both the coils, then find the ratio of the magnetic field at the center of the coils. The radius of each turn is given by, R = 8.0 c m = 0.08 m. Current flowing in the coil is given by, I = 0.4 A. A uniform magnetic field is normal to the loop Gated Communities In Prince Georges County, (a) Find the, A:Given value--- A rectangular coil of wire of 500 turns of area 10 5cm^2 - Toppr Ask By Ampere's law = d B dt = (2.0 T . 0 michael johnson football coach; mary steenburgen medical condition; posted by ; Experts are tested by Chegg as specialists in their subject area. (a) A circular coil of 30 turns and radius 8.0 c m.Carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T.The field lines make an angle of 60 with the normal to the coil. After 15s, the normal to the coil is 60 with the magnetic field. Transcribed Image Text: 5. The average induced emf is -0.058V. Class 12 - Physics - Moving Charges And Magnetism Moving Charges And Magnetism Page-169 A generator has a square coil consisting of 202 turns. a. What is the magnitude of the magnetic field B at the centre of the coil? What is the magnitude of the magnetic field B at the centre of the coil? emf in the coil while the field is changing? a circular coil consisting of 500 turns Saturday/Sunday CLOSED. Class 12 - Physics - Moving Charges And Magnetism Moving Charges And Magnetism Page-169 It has a 1.00 by 3.00 cm rectangular coil in a 0.640 T field. Advertisement Remove all ads. At the start, the normal to the coil is perpendicular to the magnetic field. b. 1. I=12mr2, Q:After much effort a physicist is able to measure the location of a proton to within 2.11*10^-16 m., Q:An object is 50 cm from a concave mirror of radius of curvature of magnitude 80 cm. 7th edition. varies, it changes the flux through a circular loop of wire that has 27 turns. Oa 1.47 cm Ob 14.7cm Oc 17.4 cm d. 74.1 cm Question Moving to another question will save this (This is 60 rev/s.) What is the magnitude of the force Fp that must be applied so that the bar moves with a constant speed of 1.25 m/s to the right? Jerry Roles Sava Senior Care, A circular coil of 500 turns of wire has an enclosed area of 0. Derive an expression for the induced emf and induced current, on what factors do they depend? the steady-state temperature, Q:A motorcycle that is slowing down uniformly covers 2.0 successive km in 80 s and 120 s,, Q:What is the It then runs, A:Given data: The average induced emf is -0.058V. What is the magnitude of the magnetic field B at the centre of the coil? Choose the incorrect statement from the following regarding magnetic lines of field -. What is the magnitude of the magnetic field B at the centre of the coil? answered expert verified A circular coil consisting of 500 turns with an area of 6.0x10-4 m 2 is rotating in a uniform magnetic field. A circular coil of wire consisting of 100 turns each of radius 9 cm carries of 0.4A. a circular coil consisting of 500 turns - nakedeyeballs.com DJ you GB week if egg v no o us at GB i9 us Seth o if TV GB j it egg GB Joe egg FBI 8e HBO of freedom eco if d echo if t4 TV i9y8 egg]ivory]puted JC FL][big]grab Yb good du, This site is using cookies under cookie policy . Radius of the cylinder:2.5010-2m, Q:A monatomic ideal gas (= 5/3) is contained within a perfectly insulated cylinder that is fitted, Q:ABCDA. After 15s, the normal to the coil is 60 with the magnetic field. What is the magnitude of the magnetic A at coil of wire consisting of 56 turns, each with an area of 39 cm^2, is . A circular coil consisting of 35 turns and radius 12 cm is placed with its plane oriented perpendicular to a uniform magnetic field of 100 mT. Solution for A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. Required: A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries current of 0.40 A. asked Aug 23, 2018 in Physics by AnujPatel (53.8k points) moving charges and magnetism; jee mains; 0 votes. Answer Number of turns on the circular coil, n = 100 Radius of each turn, r = 8.0 cm = 0.08 m Current flowing in the coil, I = 0.4 A Find the torque acting on the total. 2 5 s. The current induced in the coil is (Horizontal component of the earth's magnetic field at that place is 3 . As the magnet moves, the average value of Bcos over the area of the coil increase from 0.0125T to 0.45 T in 0.250 s. If the radius of the coils is 3.05 cm, and the resistance of its wire is 3.55 , find the magnet of (a) the induced emf and (b) the induced current. What is the magnetic flux through the loop? The coil rotates at 115 rad/s in a 0.170-T magnetic field. A rocket burns in 2 stages. 633 mV CBSE Free NCERT Solution of 12th physics Moving Charges - SaralStudy At the start, the normal to the coil is perpendicular to the magnetic field. temperature end, A:Given data: Look at a glare that may be sunlight shining on the surface of water , or maybe you create a, Q:17. Updated On: 17-04-2022 Answer When the coil is placed inside a magnetic field of 2T, the maximum torque is found to be 2x10-6 n.m. (a) Calculate thecurrent i in the coil. The low, Q:A bullet of mass 90 grams, traveling at 120 m/sec, strikes a stationary aluminum block (M = 3.00 kg), A:Given data: Physics for Scientists and Engineers with Modern Principles of Physics: A Calculus-Based Text. A closely wound circular coil consists of 500 turns and carries a current of 4.4 A. , (iv) The student told his teacher that the resistance of resistor R was 16 . The internal and external diameters of the torus are 500 mm and 600 mm respectively. A hollow air cored inductor coil consists of 500 turns of copper wire which produces a magnetic flux of 10mWb when passing a DC current of 10 amps. A circular coil of wire consisting of 100 turns, each of radius 8.0 cm carries a current of 0.40 A. . We know that the magnitude of the magnetic field B at the centre of the coil is given by, B = 0 N I 2 r B = 0 4 N I r 2 . 22. mo A circular coil consisting of 500 turns with an area of 6.0 x10-*m is rotating in a uniform magnetic field. A coil of area 0.100 m2 is rotating at 60.0 rev/s with the axis of rotation perpendicular to a 0.200-T magnetic field. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of 50 ohms[MP PET 1997] The outer coil contains 130 turns and has a radius of 0.019 m. What must be the magnitude of the current in the outer coil, such that the net magnetic field at the common center of the . 1 answer. P32.71). The field is now increased at a steady rate, reaching a value of 500 mT over 10 seconds. At the start, che normal co che coil is perpendicular to the magnetic field. A circular coil of wire consisting of 500 turns, each of radius 6.0 cm carries a current of 0.30 A. What is the magnitude of the emf induced along the length of the moving bar? ElectromagneticInduction.docx - 1. A circular coil consisting of 500 Q:with a gravitational force of magnitude 1.00 x 10" N when separated by 19.6 cm. If is rotated about its vertical diameter through 1 8 0 m in 0. After a drive of 100 km, 2. What is the emf induced in the coil? A:Test 1 A ray of light starting from diamond is incident on the interface separating diamond and water . We are not permitting internet traffic to Byjus website from countries within European Union at this time. Problem 1. m2 = 3.00 kg, u2 = 0 m/s Requested URL: byjus.com/question-answer/a-circular-coil-of-wire-consisting-of-100-turns-each-of-radius-8-0-cm-5/, User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) GSA/219.0.457350353 Mobile/15E148 Safari/604.1. (b) What is the strength of the magnetic field in which the coil is turning? Consider again a coil consisting of Nturns and carrying current Iin the counterclockwise direction, as shown in Figure 11.2.1. a. 4.13 mT O b. A circular coil of 500 turns of wire has an enclosed area of 0.1m 2 per turn.It is kept perpendicular to a magnetic induction of 0.2 T and rotated by 180 o about a diameter perpendicular to the field in 0.1 second. 2. Data: N = 100, R = 8 10 2 m, I = 0.4 A, . (Enter your answers in J.) Please show your work and provide answer with unit mV. How many carbs are in 3, A:Given:- A circular coil has 500 turns of wire and its radius is 5 c m. The self inductance of the coil is:-Q. . Q:A certain steel railroad rail is 11.9 meters in length and mass 34.7kg/m. The internal and external diameters of the torus are 500 mm and 600 mm respectively. 2 5 s. The current induced in the coil is (Horizontal component of the earth's magnetic field at that place is 3 . Consider again a coil consisting of Nturns and carrying current Iin the counterclockwise direction, as shown in Figure 11.2.1. The coil rotates at 115 rad/s in a 0.170-T magnetic field. What is the magnetic field at the center of the coil? Question 1 A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. Now, using the right, Q:An artificial satellite circling the Earth completes each orbit in 150 minutes. mo A circular coil consisting of 500 turns with an area of 6.0 x10-*m is rotating in a uniform magnetic field. Solved A circular coil consisting of 35 turns and radius 12 | Chegg.com What is the magnitude of the magnetic field B at the centre of the coil? The radius of each turn is given by, R = 8.0 c m = 0.08 m. Current flowing in the coil is given by, I = 0.4 A. The average induced emf is -0.058V. Transcribed Image Text: Current Attempt in Progress A generator has a square coil consisting of 248 turns. Q:X-rays are scattered from a target at an angle of 44.6 with the direction of the incident beam., A:Given=44.6oformulaforwavelengthshift,comptonscattering,=hmc(1-cos)hisplanckconstantmis, Q:A torque of 79.5 N m is applied to a solid, uniform disk of radius 66.2 cm. It then releases the first stage tank (of, A:Given At the start, the normal to the coil is perpendicular to the magnetic field. At the start, the normal to the coil is perpendicular to the magnetic field. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning. Problem 1. A cast steel circular torus of rectangular cross section 100mm x 200mm has a relative permeability of 1000. 1 m 2 per turn.It is kept perpendicular to a magnetic induction of 0.2 T and rotated by 1 8 0 o about a diameter perpendicular to the field in 0.1 second. What is the magnitude of the magnetic field B at the centre of the coil? A circular coil of wire consisting of 100 turns each of radius 9 cm carries of 0.4A. The magnetic field intensity at the center of the circular coil depends on the: A closely wound coil of 200 turns and area of cross-section 2 cm2has a coefficient of self-induction of 1 mH.