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Two long parallel straight conductors ca...

Two long parallel straight conductors carry current `i_(1)` and `i_(2)(i_(1)gti_(2))`. When the currents are in the same directions, the magnetic field at a point midway between the wires is `20muT`. If the direction of `i_(2)` is reversed, the field becomes `50muT`. The ratio of the current `i_(1)//i_(2)` is :

A

`5//2`

B

`7//3`

C

`4//3`

D

`5//3`

Text Solution

Verified by Experts

The correct Answer is:
B
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