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Two wires with currents 2 A and 1 A are ...

Two wires with currents 2 A and 1 A are enclosed in a circular loop. Another wire with current 3 A is situated outside the loop as shown

A

`mu_(0)`

B

`3mu_(0)`

C

`6mu_(0)`

D

`2mu_(0)`

Text Solution

Verified by Experts

The correct Answer is:
A
According to Amphere.s cuircuital law `oint vecB. dvecl = mu_0 l_("enclosed") = mu_0(2A-1A)=mu_0`
Since current 2A and 1A are in the opposite direction.
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