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3 marksAlternating Current

CSEC Physics · January 2012 · Paper 2 · Question 4(b)(i)

The waveform shown in Figure 4 depicts the current through a resistor connected in an a.c. circuit.

Calculate the period and frequency of the alternating supply.

This question uses a figure or table from the paper — you'll see it when you practise.

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Other parts of this question

  1. 4(a)With reference to the d.c. motor shown in Figure 3, explain how the coil is able to rotate continuously.[6 marks]
  2. 4(b)(ii)If the resistor is 45Ω, determine the peak-to-peak voltage across the resistor.[3 marks]
  3. 4(b)(iii)Calculate the maximum power dissipated in the resistor.[3 marks]

More practice: the rest of this paper · more Alternating Current questions · all CSEC Physics past papers