Self induction is also known as the Inertia of electricity. Why?

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Self inductance of a coil plays the role of inertia in circuit. The Sl unit of self inductance is ..........

Self inductance of a coil plays the role of inertia in circuit. Current in a circuit falls from 5A to 1A in 0.1. second. If an average EMF of 200 volts is in duced, find the self inductance of the coil.