(a)[2]
State Faraday’s law that describes electromagnetic induction.
(b)[3]
An ideal transformer is shown in Fig. 10.1. Explain why an alternating current in the primary coil leads to a current in the load resistor.
(c)[3]
In (b), the primary coil has $2700$ turns. The secondary coil has $450$ turns. The e.m.f. $E$ across the primary coil is given by $E = 220\sin(100\pi t)$, where $E$ is in volts and $t$ is measured in seconds. Calculate the root-mean-square (r.m.s.) e.m.f. induced in the secondary coil.