Question

A straight wire is held vertically and current is passed through it in
the downward direction. A magnetic needle is kept to the north of the wire.
In which direction will the north pole of the needle point? Justify your
answer.

Answer 1

Answer:

When the current in the wire is upwards, the needle will deflect with its north pole towards west.

If the current in the wire is reversed, the north pole of the needle will deflect towards east.