Quelpr
4 marksAlternating Currents

CAPE Physics Unit 2 · May/June 2025 · Paper 2 · Question 2(g)

Describe the procedure for an experiment that can be used to verify the relationship between the peak value of an alternating current and the equivalent direct current.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)(i)Use Figure 2 to determine the Peak value (amplitude) of the waveform.[1 mark]
  2. 2(a)(ii)Use Figure 2 to determine the Frequency of the waveform.[3 marks]
  3. 2(a)(iii)Use Figure 2 to determine the RMS value of the waveform.[2 marks]
  4. 2(b)Use your results from (a) to derive an expression for the waveform in Figure 2 in the form v = v_max sin ωt.[3 marks]
  5. 2(c)On the graph shown in Figure 2 on page 10, sketch the output voltage for ONE cycle given that there is a volt drop of 0.7 volts across the diode, D, when it is…[3 marks]
  6. 2(d)Complete the circuit in Figure 4 by inserting diodes at D1, D2, D3 and D4, with orientation matching the polarity of the output terminals.[4 marks]
  7. 2(e)On Figure 4, draw arrows to show the direction of current flow for the first half of the cycle, consistent with the polarity of the output terminals.[2 marks]
  8. 2(f)Given that the input to the full-wave bridge rectifier in Figure 4 is that shown in Figure 2, determine the amplitude and frequency of the fully rectified wave…[2 marks]
  9. 2(h)State THREE advantages and THREE disadvantages of using an alternating current and high voltages for the transmission and distribution of electrical energy.[6 marks]

More practice: the rest of this paper · more Alternating Currents questions · all CAPE Physics Unit 2 past papers