CAPE Physics Unit 2 · 2009 · Paper 1 · Question Q3
The diagram below shows a battery connected in series with a 2 ohm resistor and a switch S. A voltmeter connected across the battery reads 6\text{ V} when S is opened and 4\text{ V} when S is closed.
What is the internal resistance of the battery?
- (A)
0.3\text{ }\Omega - (B)
1.0\text{ }\Omega - (C)
2.0\text{ }\Omega - (D)
3.0\text{ }\Omega
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