The two linear parallel conductors carrying currents in the opposite direction…………………each other.

Options

A. neither attract nor repel each other
B. repel each other
C. attract each other
D. will have rotational motion.

Answer

C

Explanation

Two wires 1 and 2 carrying currents `i_(1)` and `i_(2)` respectively are shown in the figure given below,

Force on wire 2 due to `B_(1)` (field of wire 1) is given by
`F_(2)=i_(2)lB_(1)`
Using right hand screw rule, direction of `F_(2)` would be towards wire 1.
Similarly, force on wire due to `B_(2)` (field of wire 2)
`F_(1)=i_(1)lB_(2)`
Again, by using right hand screw rule,
direction of `F_(1)` would be towards wire 2.
If two parallel conductors carry (equal or unequal) current in the same direction, they will exerted force towards each other i.e. , they will be attract each other.