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A wire PQR carrying a current l is bent ...

A wire PQR carrying a current l is bent as shown in the figure. It is placed in a uniform magnetic field B. What is the ratio of magnitude of the force on PQ to that on QR ?

A

Bil , 0

B

2BIl , 0

C

0 , BIl

D

0,0

Text Solution

Verified by Experts

The correct Answer is:
C
For PQ - `F_(m) = I (vecl xx vecB) = Il B sin theta = 0 [ theta = 0^(@)]`
For QR - `F_(m) = IlB [ theta = 90^(@)]`
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