If $R$ and $L$ represent respectively resistance and self-inductance,which of the following combinations has the dimensions of frequency?

Two solenoids have identical geometrical construction and the same number of turns,but one is made of thick wire and the other of thin wire. Which of the following quantities are different for the two solenoids?
$(a)$ Self-inductance.
$(b)$ Rate of Joule heating if the same current flows through them.
$(c)$ Magnetic potential energy if the same current flows through them.
$(d)$ Time constant.

Define the unit of self-inductance. On which factors does self-inductance depend?

Which of the following is not the unit of self-inductance?

The self-inductance of a solenoid is:

The current in self-inductance $L=40\; mH$ is to be increased uniformly from $1\; A$ to $11\; A$ in $4\; ms$. The $e.m.f.$ induced in the inductor during this process is ..... $V$.