Q112 / 180 · AIIMS 2008 · Physics
Assertion : In the following circuit, emf is \(2 \mathrm{~V}\) and internal resistance of the cell is \(1 \Omega\) and \(R=1 \Omega\), then reading of the voltmeter is \(1 \mathrm{~V}\).

Reason : \(V=E-I R\) where \(E=2 \mathrm{~V}\), \(I=2 / 2=1 \mathrm{~A} \text {. }\)

Reason : \(V=E-I R\) where \(E=2 \mathrm{~V}\), \(I=2 / 2=1 \mathrm{~A} \text {. }\)
- AIf both assertion and reason are true and reason is the correct explanation of assertion
- BIf both assertion and reason are true but reason is not the correct explanation of assertion
- Correct answerCIf assertion is true but reason is false
- DIf both assertion and reason are false.
Solution
$V=E-I(R+r)$
Hence, the correct answer is option: 'C'.