Question

Self inductance of coil measures
(A) Electrical inertia
(B) Electric friction
(C) Induced emf
(D) induced current

Answer 1

Hint: Here, we will use the Self inductance property that explains the property of a current carrying wire that opposes the flow of electric current flowing through it. The self inductance is the change in the magnetic field. It tells us about the property of a system that opposed the change in the current through the system.

Complete step by step answer:
We know that the self-inductance in a coil measures the size of electromotive force or voltage induced in the coil. If the electromotive force in a conductor differs from the one in which the current is changing, then we say this phenomenon as the mutual induction. Also, the changing magnetic field occurring due to the varying current in the conductor induces the varying current in the conductor. We call this phenomenon self-inductance. It also opposes the change to bring it about.
Now, when a current starts to flow through the coil of wire then the flow of current is opposed by the resistance of the metal of the wire. Then it is obvious that the self-inductance will come into play and it works as electromagnetic inertia that opposes the change in the electric current and the change in the magnetic field of the system. From the above statements we came to know that the self-inductance of the coil is used to measure the electrical inertial.

So, the correct answer is “Option A”.

Note:
We should know that the self inductance opposes the growth or the decay of current flowing through the solenoid coil. Also, the self inductance of a solenoid coil is dependent upon the total number of turns of the solenoid, the cross-sectional area of the solenoid and the length of the solenoid coil.