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An electric current passes through a str...

An electric current passes through a straight wire. If magnetic compasses are placed at the points X and Y as shown, then

A

The needles will not deflect

B

Only one of the needles will deflect

C

The needles will deflect in the same direction

D

The needles will deflect in the opposite directions

Text Solution

Verified by Experts

Current carrying wire produces magnetic field, but direction of magnetic field on the given points X and Y are different. X.

This is found by right hand thumb rule. So magnetic compasses on X and Y experience magnetic force of same magnitude but in opposite directions. Hence, the needles will deflect in opposite directions
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