Question

what happens to the deflection of the compass needle at a point near current carrying straight conductor
(a) if the current is increased
(b) if the direction of current in the conductor is changed
(c) if compass is moved away from the conductor
(d) draw the diagram showing the magnetic field lines around the straight current carrying wire

Answer 1

Deflection infreases
Direction of needle deflection reverses
Deflection decreases

I cant draw it over here