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A conducting wire MN carrying a current I is bent into the shape as shown and placed in xy plane. A uniform magnetic field `vecB=-Bhatk` is existing in the region. The net magnetic force experenced by the conducting wire MN is

A

2BIR

B

3BIR

C

4BIR

D

6BIR

Text Solution

Verified by Experts

The correct Answer is:
D
Since `vecB` is constant in the region The net magnetic force experienced by the conducting by the conducting wire MN is
`vecF=l(vecL_(eff)xxvecB)`
where `vecL_(eff)=6Rhati`
`vecF=l[6RhatixxB(-hatk)]`
`F=6BlR(hatj)`
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