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A semi circular arc of radius r and a st...

A semi circular arc of radius r and a straight wire along the diameter, both are carrying same current `i` find out magnetic force per unit length on the small element P, which is at the centre of curvature.

A

a.`((mu_(0)i^(2))/(4r))`

B

b.`((mu_(0)i^(2))/(2r))`

C

c.`((mu_(0)i^(2))/(r))`

D

d.`((2mu_(0)i^(2))/(r))`

Text Solution

Verified by Experts

The correct Answer is:
A
`F=Bi=((mu_(0)i^(2))/(4r))`
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