CAPE Physics Unit 2 · 2017 · Paper 1 · Question Q6
Item 6 refers to the following circuit diagram in which a cell of e.m.f., E, and internal resistance, r, is connected to a resistor of resistance, R.
[Circuit diagram showing a cell with internal resistance, in parallel with a voltmeter, and in series with a switch and resistor R]
A voltmeter of infinite resistance is connected in parallel with the resistor. Which of the following positions for the switch are correct when measuring the e.m.f. and terminal p.d. of the circuit?
- (A)e.m.f.: Open, Terminal p.d.: Open
- (B)e.m.f.: Open, Terminal p.d.: Closed
- (C)e.m.f.: Closed, Terminal p.d.: Open
- (D)e.m.f.: Closed, Terminal p.d.: Closed
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