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12 A circular coil of 20 turns and 10 cm radius is placedin a uniform magnetic field of 0.10 T normal to theplane of the coil. If the current in the coil is 5 A,cross-sectional area is 10-5 m2 and coil is made upof copper wire having free electron density about1029 m3, then the average force on each electron inthe coil due to magnetic field is(a) 2.5 x 10-25 N(c) 4 x 10-25 N(b) 5 x 10-25 N(d) 3 x 10-25 N |
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Answer» 12 A circular coil of 20 turns and 10 cm radius is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5 A, cross-sectional area is 10-5 m2 and coil is made up of copper wire having free electron density about 1029 m3, then the average force on each electron in the coil due to magnetic field is (a) 2.5 x 10-25 N (c) 4 x 10-25 N (b) 5 x 10-25 N (d) 3 x 10-25 N |
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