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P, Q and R are long straight wires in ai...

P, Q and R are long straight wires in air, carrying currents as shown. The force on Q is directed

A

to the left

B

to the right

C

perpendicular to the plane of the diagram

D

along the current in Q

Text Solution

Verified by Experts

The correct Answer is:
A
Since the magnetic field at Q by P and R is inward, therefore, both due to 20 A (P) as well as 60 A (R), the force on Q is towards left.
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