Quelpr
4 marksElectrical Circuits

CAPE Physics Unit 2 · 2006 · Paper 1 · Question 2(b)(ii)

The potentiometer wire of length 1.00 m has a potential difference of 2.00 V across it.

When the switch is closed, the balance length changes to 36.6 cm. Given that resistor R has a resistance of 5.00 Ω, calculate the internal resistance of cell X.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)Complete the circuit diagram to show how a slide-wire potentiometer is connected to compare the p.d. across PQ with the switch open to the p.d. when the switch…[4 marks]
  2. 2(b)(i)With the switch open, the balance length is 54.2 cm. Calculate the e.m.f. of cell X.[2 marks]

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