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A uniformi magnetic field of 3 T is esta...

A uniformi magnetic field of 3 T is established along the positive Z-direction. A rectangular loop in XY plane of sides 10 cm and 5 cm carries a current of 11 A as shown The torque on the loop is:

A

`+ 1.8 xx 10^(-2) hatj Nm`

B

`-1.8 xx 10^(-2) hatj Nm`

C

Zero

D

`-1.8 xx 10^(-2) hatj Nm`

Text Solution

Verified by Experts

The correct Answer is:
C
Torque on a loop
`tau = vecM xx vecB`
`tau = MB sin theta`
where `theta =` angle between `vecM` and `vecB`
`theta = 0 rArr = B sin 0`
`tau =0`
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