Magnetics 4 Question 10

11. A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field B0 such that B0 is perpendicular to the plane of the loop. The magnetic force acting on the loop is

(1983, 1M)

(a) irB0

(b) 2πirB0

(c) zero

(d) πirB0

Passage Based Questions

Passage

The figure shows a circular loop of radius a with two long parallel wires (numbered 1 and 2) all in the plane of the paper. The distance of each wire from the centre of the loop is d. The loop and the wires are carrying the same current I. The current in the loop is in the counter-clockwise direction if seen from above.

(2014 Adv.)

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Answer:

Correct Answer: 11. (c)

Solution:

  1. Magnetic force on a current carrying loop in uniform magnetic field is zero.


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