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PQ and RS are long parallel current carr...

PQ and RS are long parallel current carrying conductors separated by a certain distance. M is the midpoint between them (see the figure). The net magnetic field at M is B. Now, the current in the wire PQ is switched off. The magnitude of magnetic field at M becomes

A

2B

B

B

C

`B/2`

D

`3B`

Text Solution

Verified by Experts

The correct Answer is:
B
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