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Two wires AO and OC carry equal currents...

Two wires AO and OC carry equal currents i as shown in Fig. One end of both the wires extends to infinity. Angle AOC is `alpha`. The magnitude of magnetic field is point P on the bisector of these two wires at a distance r from point O is

A

`(mu_(0))/(2pi)(i)/(r) cot ((alpha)/(2))`

B

`(mu_(0))/(4pi)(i)/(r) cot ((alpha)/(2))`

C

`(mu_(0))/(2pi)(i)/(r)((1+cosalpha/2))/(sin((alpha)/(2)))`

D

`(mu_(0))/(2pi)(i)/(r)sin((alpha)/(2))`

Text Solution

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The correct Answer is:
A
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