
The r.m.s. voltage of the waveform shown is:




Important Questions on Alternating Current
The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is,

The current in an inductance coil varies with time according to following graph,
Which one of the following plots shows the variations of voltage in the coil?

Two sinusoidal voltages of the same frequency are shown in the diagram. What is the frequency and the phase relationship between the voltages?

The voltage across a pure inductor is represented by the following diagram.
Which one of the following diagrams will represent the current?

In pure inductive circuit, the curves between frequency and reciprocal of inductive reactance is

The graphs given below depict the dependence of two reactive impedances and on the frequency of the alternating emf applied individually to them. We can then say that


Is the following circuit correctly drawn? (value of current in each branch is given in amperes)
