In domestic electrical wiring,which color of insulation is typically used for the neutral wire?

The strength of the magnetic field of a solenoid does not depend upon:

$(i)$ $A$ compass needle gets deflected when brought near a current-carrying conductor. Why?
$(ii)$ What happens to the deflection of the needle when the current in the conductor is increased?

What is meant by the term magnetic field lines? List any two properties of magnetic field lines.

Name the rule used to find the direction of force on a current-carrying conductor placed in a magnetic field.

When a light,straight conducting wire is suspended perpendicular to a strong magnetic field and an electric current is passed through it,the magnetic force acting on it is proportional to which of the following?