A 10-cm length of wire carries a current of 30 A The wire is in uniform field B

Question

A 10-cm length of wire carries a current of 30 A The wire is in uniform field B 050 T as in the diagram below what is the magnitude and direction of the force on this segment of wire? O 10N, left O 0.15N, left O 30 N, right 05 N,right O 15 N, into the page Question 20 A long stralght wire has a constant current flowing to the right. A square ring is situated above the wire, and also has a constant current flowing through it (as shown). Which of the following statements is true? The net magnetic force on the ring is upward, and there is also a net torque on the ring. O The net magnetic force on the ring iszero, and the net torque is zera O The net magnetic force on the ring is downward and there is also a net torque on the ring O The net magnetic force on the ring is zero, but there is a net torque on the ring The net magnetic force on the ring is downward,and the net torque is zera

Explanation / Answer

Magnetic force F=BiL=0.5×3×0.1=0.15N Left

20.

Last option is correct one.

The net magnetic force on ring is downward and the net torque is zero.

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