Question

A magnetic compass is placed near a current carrying wire. the deflection of the needle of the magnetic compass increases. it shows that *

1) current in the wire is decreasing
2) current in the wire is increasing
3) current in the wire has nothing to do with the deflection of the needle of the magnetic compass
4) magnetic compass has been disturbed by someone.

Answer 1

⇒It the current is increased in the conductor the deflection of the compass needle increases.

Answer 2

Answer:

The direction of the magnetic field is perpendicular to the wire. The deflection increases when the current is increased because the magnitude of the field is directly proportional to the strength of the electric current.