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AB and CD are long staright conductors, ...

`AB` and `CD` are long staright conductors, distance `d` apart, carrying a current `I`. The magnetic field on `BC` due to the currents in `AB` and `CD`

A

`(-mu_(0)I)/(2pi d) "" hatk`

B

`(-mu_(0) I)/(pi d) "" hatk`

C

`(-mu_(0) I)/(4pi d) "" hatk`

D

`(-mu_(0) I)/(8pi d) "" hatk`

Text Solution

Verified by Experts

The correct Answer is:
B
`vecB = -2 xx ((mu_(0))/(4pi)) ((I)/(d//2)) hatk = ((mu_(0) I)/(pi d)) (-hatk)`
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