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2 marksAlternating Currents

CAPE Physics Unit 2 · 2006 · Paper 1 · Question 6(a)(iii)

An alternating signal is described by V = 150 sin(400 pi t), with V in mV and t in seconds.

Find the r.m.s. voltage of the signal.

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Other parts of this question

  1. 6(a)(i)Determine the frequency of the signal.[1 mark]
  2. 6(a)(ii)Determine the period of the signal.[1 mark]
  3. 6(a)(iv)Draw the graph showing the variation of voltage with time on the axes in Figure 6.[3 marks]
  4. 6(b)Draw a graph on the axes in Figure 8 showing how the output voltage varies with time, indicating the vertical scale clearly.[3 marks]

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