HELPPP WORTH A LOT OF POINTS !!! If the magnet inside the iron coil is at rest (no motion), the voltage induced in the
circuit is:
A. equal to the number of turns in the iron core.
B. equal to the current flowing in the wire.
C. equal to zero
D. equal to the external resistance in the circuit.

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]