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A rectangular coil PQ has 2n turns an ar...

A rectangular coil `PQ` has `2n` turns an area `2a` and carries a current `2I` (refer fiure) The plane of the coil is at `60^(@)` to a horizontal unifrom magnetic field of flux density `B` The torque on the coli due to magnetic force is
.

A

`Bna// sin60^(@)`

B

`8Bna// sin60^(@)`

C

`4na// sin60^(@)`

D

none

Text Solution

Verified by Experts

The correct Answer is:
B
`tau = NIAB sin 0`
`t = 2n. 2I. 2aB sin 30^(@)`
` tau = 2n. 2I.2aB cos 60^(@)`
`tau=4nIab cos60^(@)` .
.
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