Energy needed to establish an alternating current I in a coil of self inductance L is

Energy required to establish a current of 4 A in a coil of self-inductance L=200 mH is

The unit of self inductance of a coil is

The coefficient of self inductance of a coil is

Assertion: If the frequency of alternating current in an AC is circuit consisting of an inductance coil is increased then current gets decreased. Reason: The current is inversely proportional to frequency of alternating current.

Which one of the following is the unit of self inductance of a coil ?

Assertion : If some ferromagnetic substance is filled inside a solenoid, its coefficient of self induction L will increase. Reason : By increasing the current in a coil, its coefficient of self induction L can be increased.