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Q.

A wire PQR is bent as shown in figure and is placed in a region of uniform magnetic field B. The length of PQ=QR=l. A current I ampere flows through the wire as shown. The magnitude of the force on PQ and QR will be

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a

BIl, 0

b

0, BIl

c

2BIl, 0

d

0, 0

answer is C.

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Detailed Solution

F=iLB sinθ

FPQ=IlB sin0°=0

FQR=IlB sin90°=IlB

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