1.

 A long, straight conductor lies along the axis of a ring. Both carry current I. The force on the ring is proportional to (a) I (b) I3/2 (c) I2 (d) zero

Answer»

Correct Answer is: (d) zero

The magnetic field due to the ring is along its axis. Therefore, there is no force of interaction between the ring and the straight conductor lying along its axis.



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