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

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • Correct answer
    C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

$V=E-I(R+r)$

Hence, the correct answer is option: 'C'.

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