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4 marksElectrical Circuits

CAPE Physics Unit 2 · 2002 · Paper 2 · Question 5(c)(i)

A 6.00 V cell with zero internal resistance is connected in circuits Figure 8(i) and Figure 8(ii). In Figure 8(i), a voltmeter across AB reads 2.0 V.

Calculate the resistance of the voltmeter.

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Other parts of this question

  1. 5(a)(i)Derive an expression for the equivalent resistance of THREE resistors connected in parallel.[3 marks]
  2. 5(a)(ii)Distinguish between the electromotive force of a cell and the terminal potential difference across a cell.[2 marks]
  3. 5(b)A parallel combination of rheostats R1 and R2 is used for current control (Figure 7), where the total resistance of R1 is 25 times that of R2. Describe the…[3 marks]
  4. 5(c)(ii)Calculate the voltmeter reading when connected across A'B' in Figure 8(ii).[5 marks]
  5. 5(c)(iii)State what the results suggest concerning the use of voltmeters in electrical circuits.[3 marks]

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