Alternating Current

12.2.3   Describe the effect on the induced emf of changing the generator frequency.




12.2.4    Discuss what is meant by the root mean squared (rms) value of an alternating current or voltage
The rms is the square root of the mean of the square. The rms value of an alternating current (or voltage) is the value of the direct current (or voltage) that dissipates power in a resistor at the same rate.


12.2.5    State the relation between peak and rms values for sinusoidal currents and voltages.