Question

A power line lies along the east-west direction and carries a current of 10 ampere. The force per metre due to the earth's magnetic field of $10 ^ { - 4 }$ tesla is

• A.
• B.
• C.
• D. $10 ^ { - 2 } N$

Answer 1

Answer: (C)

Answer 2

Force on the wire = Bil

Force per unit length