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Two long parallel wires P and Q are both...

Two long parallel wires `P` and `Q` are both perpendicular to the plane of the paper with distance `5m` between them. If `P` and `Q` carry current of `2.5` amp and `5` amp respectively in the same direction, then the magnetic field at a point half way between the wires is

A

`mu_0//17`

B

`sqrt3mu_0//2pi`

C

`mu_0//2pi`

D

`3mu_0//2pi`

Text Solution

Verified by Experts

The correct Answer is:
C
`B = (mu_0)/(4pi) (2i_2)/(r//2)-mu_0/(4mu)(2i_1)/((r//2))=(mu_0)/(4pi)4/r(i_2-i_1)`
`mu_0/(4pi)4/5(5-2.5)=mu_0/(2pi)`
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DISHA PUBLICATION-MOVING CHARGES AND MAGNETISM -EXERCISE - 1 : Concept Builder (Topic wise) (Topic 2 : Magnetic Field Lines, Biot - Savart.s Law and Ampere.s Circuital Law
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