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A semicircular wire of radius r, carryin...

A semicircular wire of radius `r`, carrying a current `I`, is placed in a magnetic field of magnitude `B`. The force acting on it

A

can never be zero

B

can have maximum magnitude `2 B I r`

C

can have the maximum magnitude `B I pi r`

D

can have the maximum magnitude `B I r`

Text Solution

Verified by Experts

The correct Answer is:
B

`F_(m) = BI.2r sin theta`
`(F_(m))_(max) = 2BI r("Since" theta = 90^(@))`
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