When the number of magnetic field lines through a closed loop changes ,an induced current flows in the coil.
Is this statement true.

Can a magnetic field line from a closed loop? Explain.

Why do the electrostatic field lines not form closed loops?

Whenever there is a relative motion between a coil and a magnet ,and induced current flows in the coil. What is this phenomenon known as?

The strength of magnetic field gets halved if the current flowing in a circular current carrying wire is doubled. Is this statement true.

Greater the power of an appliance, higher is the current flowing through it. IS this statement true.

The magnitude of induced emf produced depends on the rate of change of magnetic flux through the coil. is this statement true.

Magnetic field lines are discontinuous curves. Is this statement true.

Self inductance or coefficient of self induction Whenever an electric flowing through a coil changes, the magnetic flux linked with the circuit also changes. And an induced emf is produced in the circuit. This phenomenon is called self-induction. The magnetic flux linked with the coil (phi) is proportional to the current (I) flowing in te circuit i.e. phi propto I . The self-inductance of the coil is