what is the direction of deflection of compass needle when current carrying conductor is placed perpend. to axis of needle. give reasons.
There is no deflection as magnetic field lines are perpendicular to the plane of compass needle in this case.
The needle of a compass does not deflect when it is brought near a current carrying conductor.
On which of the following factor, the direction of deflection of a magnetic needle of a compass depends when the compass is kept near a current carrying wire?