Quelpr
3 marksElectrical Circuits

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

Resistance combinations and cell characteristics.

Derive an expression for the equivalent resistance of THREE resistors connected in parallel.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(a)(ii)Distinguish between the electromotive force of a cell and the terminal potential difference across a cell.[2 marks]
  2. 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]
  3. 5(c)(i)Calculate the resistance of the voltmeter.[4 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]

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