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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 in circular loop. Another wire with current 3 A is situated outside the loop as shown. The `oint vec B. vec (dl)` around the loop is

A

a. `mu_(0)`

B

b. `3 mu_(0)`

C

c. `6 mu_(0)`

D

d. `2 mu_(0)`

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`mu_(0)`
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