Self-induction is called the inertia of electricity. Why?

A plot of magnetic flux $\left(\varphi \right)$ versus current $\left(I\right)$ is shown in FIg.6.50 for two inductors $A$ and $B$. Which of the two has larger value of self-inductance?

Figure 6.51 shows two coils $C_1$ and $C_2$ placed facing each other. The steady current in coil $C_2$ produces a steady magnetic field. Whenever the coil $C_2$ is moved towards $C_1$ or away from it, a current is induced in $C_1$ as indicated by the deflection in the galvanometer.

Answer the following question:

What would you do to obtain a large deflection of the galvanometer?