Rectification and smoothing: past paper questions

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• Question 7May/June 2026, paper 41Structured8 marksHas a diagram

  State what is meant by half-wave rectification of an alternating current.

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• Question 7Oct/Nov 2025, paper 42Structured8 marksHas a diagram

  An alternating voltage $V$ varies with time $t$ according to $$V=18\cos 40\pi t$$ where $V$ is in $\text{V}$ and $t$ is in $\text{s}$. For the alternating voltage: show that the period is $0.050\text{ s}$

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• Question 6Oct/Nov 2024, paper 41Structured11 marksHas a diagram

  State what is meant by rectification of an alternating voltage.

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• Question 5May/June 2023, paper 41Structured9 marksHas a diagram

  Part of an electric circuit is shown in Fig. 5.1. The circuit is used to produce half-wave rectification of an alternating voltage of potential difference (p.d.) $V_{\text{IN}}$. The output p.d.

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• Question 8May/June 2026, paper 42Structured7 marksHas a diagram

  A sinusoidal alternating input voltage $V_{\text{IN}}$ is supplied to a circuit that produces a rectified and smoothed output voltage $V_{\text{OUT}}$. The variations with time $t$ of $V_{\text{IN}}$ and $V_{\text{OUT}}$ are shown in Figure 8.1 and Figure 8.2 respectively.

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• Question 6May/June 2025, paper 41Structured12 marksHas a diagram

  Fig. 6.1 shows a circuit that rectifies an alternating input voltage $V_{\mathrm{I}\mathrm{N}}$ and produces an output voltage $V_{\mathrm{O}\mathrm{U}\mathrm{T}}$ across a resistor $R$.

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• Question 7May/June 2023, paper 42Structured10 marksHas a diagram

  Four diodes are used in a bridge rectifier circuit to produce rectification of a sinusoidal a.c. input voltage $V_{\text{IN}}$. Fig. 7.1 shows part of the circuit, but three of the diodes are missing.

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• Question 8May/June 2025, paper 42Structured10 marksHas a diagram

  Fig. 8.1 shows a circuit that produces rectification of an alternating input voltage. The input voltage $V_{\mathrm{I}\mathrm{N}}$ is sinusoidal.

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• Question 7May/June 2024, paper 41Structured10 marksHas a diagram

  A circuit contains a power supply that provides a sinusoidal alternating input voltage $V_{\mathrm{I}\mathrm{N}}$. There is an output voltage $V_{\mathrm{O}\mathrm{U}\mathrm{T}}$ across a load resistor $R$, as shown in Fig. 7.1. Fig. 7.1 State the purpose of the circuit in Fig. 7.1.

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• Question 6May/June 2025, paper 43Structured12 marksHas a diagram

  Fig. 6.1 shows a circuit that rectifies an alternating input voltage $V_{\text{IN}}$ and produces an output voltage $V_{\text{OUT}}$ across a resistor $R$.

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