Quelpr
5 marksAlternating Currents

CAPE Physics Unit 2 · May/June 2026 · Paper 2 · Question 2(b)

Figure 3 shows a circuit with the V_supply from Figure 2 driving a load of 7.5 ohms.

Calculate the power dissipated in the circuit in Figure 3.

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. 2(a)State the meaning of EACH symbol in the table below and use Figure 2 to determine each value.[8 marks]
  2. 2(c)(i)Use Figure 2 to determine the times in the given cycle at which the diode in Figure 4 starts and stops conducting.[2 marks]
  3. 2(c)(ii)Determine the peak voltage across the load in Figure 4.[2 marks]
  4. 2(c)(iii)In the space provided below, sketch ONE cycle of the output voltage across the load in Figure 4 on page 13.[1 mark]
  5. 2(d)Complete the table below by inserting THREE characteristics of an ideal operational amplifier and a real operational amplifier. For EACH characteristic, state…[6 marks]
  6. 2(e)(i)Calculate the voltage gain of the circuit in Figure 5.[2 marks]
  7. 2(e)(ii)Determine the value of the output voltage when the input voltage is 2 V.[2 marks]
  8. 2(e)(iii)If the input voltage is now 5 V, state the value of the output voltage, giving a reason for your response.[2 marks]

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