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Q. Assertion : In the following circuit, emf is $2\, V$ and internal resistance of the cell is $1 \Omega$ and $R = 1 \Omega$, then reading of the voltmeter is $1\, V$.
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Reason : $ V = E - IR$ where $E = 2 V,\,,I = 2 / 2 = 1 A .$

AIIMSAIIMS 2008Current Electricity

Solution:

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