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A small coil C with N = 100 turns is mou...

A small coil C with N = 100 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnet as shown in the figure. The cross-sectional area of coil is A = 1.0 `cm^(2)`, length of arm OA of the balance beam is l = 20 cm. When there is no current in the coil, the balance is in equilibrium. On passing a current i = 18 mA through the coil, the equilibrium is restored by putting the additional counter weight of mass `Delta`m = 40 mg on the balance pan. Find the magnetic induction at the spot where coil is located.

A

0.11 T

B

0.22 T

C

0.44 T

D

0.54 T

Text Solution

Verified by Experts

The correct Answer is:
C
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