Physics 9702 · AS & A Level · Rectification and smoothing

Rectification and smoothing — practice question

The alternating power supply’s output p.d. is given by $V = 320\sin(100\pi t)$, where $V$ denotes the p.d. in volts and $t$ is measured in seconds.
(a)[1]

Determine the root-mean-square (r.m.s.) p.d. for the power supply.

(b)[2]

Determine the period $T$ of the output waveform.

(c(i))[1]

State the name of the rectification produced by the diode in Fig. 10.1.

(c(ii))[3]

On Fig. 10.2, sketch how the p.d. $V_R$ across $R$ varies with time $t$ from $t = 0$ to $t = 40\text{ ms}$.

(c(iii))[1]

On Fig. 10.1, draw the symbol of a component that could be added to smooth $V_R$.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: The r.m.s. voltage is $230\ \text{V}$

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