How does the generator effect work?

The changing magnetic field within the loops of wire creates an electric field that pushes the electrons in the wire through the lamp, briefly lighting it

Explanation:

The GE demonstrates that a voltage, and hence a current, can be generated by plunging a coil of wire into and out of a strong magnet.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

i think its d if wrong im sorry