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2 marksResistance, R

CSEC Physics · 1996 · Paper 2 · Question 4(b)(iii)

The graph in Figure 7 shows how the currents through a small lamp and a piece of resistance wire change as potential difference is varied.

The lamp, resistance wire and a battery are now connected in series. If the current in the circuit is 0.20 A, determine the total potential difference across the lamp and resistance wire.

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Other parts of this question

  1. 4(a)(i)Draw a circuit diagram to represent this arrangement of components.[3 marks]
  2. 4(a)(ii)Explain why it is necessary for the voltmeter to have a high resistance.[1 mark]
  3. 4(a)(iii)Complete Table 2 to show how the meter readings change when the sliding contact on the rheostat is moved from end X to the other end Y.[5 marks]
  4. 4(b)(i)Find the resistance of the resistance wire.[3 marks]
  5. 4(b)(ii)Find the resistance of the lamp when the current flowing is 0.20 A.[2 marks]

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