A conducting thick copper rod of length 1 m carries a current of 15 A and is located on the Earth’s equator. There the magnetic flux lines of the Earth’s magnetic field are horizontal, with the field of 1.3 × 10-4 T, south to north. The magnitude and direction of the force on the rod, when it is oriented so that current flows from west to east, are(A) 14 × 10-4 N, downward.(B) 20 × 10-4 N, downward.(C) 14 × 10-4 N, upward.(D) 20 × 10-4 N, upward.

A conducting thick copper rod of length 1 m carries a current of 15 A

1.	A conducting thick copper rod of length 1 m carries a current of 15 A and is located on the Earth’s equator. There the magnetic flux lines of the Earth’s magnetic field are horizontal, with the field of 1.3 × 10-4 T, south to north. The magnitude and direction of the force on the rod, when it is oriented so that current flows from west to east, are(A) 14 × 10-4 N, downward.(B) 20 × 10-4 N, downward.(C) 14 × 10-4 N, upward.(D) 20 × 10-4 N, upward.
Answer» Correct option is: (D) 20 × 10^-4 N, upward.