Quelpr
3 marksResistance, R

CSEC Physics · 2021 · Paper 2 · Question 5(b)(ii)

Figure 7 shows a graph of the variation of voltage with time across the output terminals of an a.c. generator.

The peak voltage is applied by the generator across a 100.0 Ω resistor. Calculate the peak value of the current in the resistor.

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

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(a)(i)Draw the magnetic field between the poles of the magnet on Figure 6.[2 marks]
  2. 5(a)(ii)State the direction in which side DA of the coil will move as the current starts flowing through the circuit.[1 mark]
  3. 5(a)(iii)Name the rule used to determine the direction in which side DA of the coil moves.[1 mark]
  4. 5(a)(iv)Explain why a split-ring (commutator) is used in a d.c. motor.[2 marks]
  5. 5(b)(i)Calculate the value of the frequency for the generator.[3 marks]
  6. 5(c)(i)State the effect this will have on the period of the output.[2 marks]
  7. 5(c)(ii)State the effect this will have on the value of the output voltage.[1 mark]

More practice: the rest of this paper · more Resistance, R questions · all CSEC Physics past papers