An alternating current (a.c.) generator consists of a rectangular coil rotating at a constant rate in a uniform magnetic field. The coil completes one full rotation every 0.015 s.
Calculate the frequency of the alternating current produced by the generator.
Describe the resulting graph of the voltage output against time from t=0t = 0t=0 to 0.030 s (assuming the output is a sine curve starting at zero). State how many complete cycles are observed and the times at which the voltage output is zero.
State the orientation of the plane of the coil relative to the magnetic field lines when the magnitude of the output voltage is at its maximum. Explain your answer with reference to magnetic flux.
The output of the generator is connected to a circuit containing a single diode in series with a resistor.
State the name of the process that uses a diode to convert a.c. to d.c.
Explain how the diode affects the current flowing through the resistor.
24 exam-style questions on CIE IGCSE Physics 4.5.2 The a.c. generator. Each one has a worked solution and a mark scheme showing where the marks go.