In the circuit shown \( E, F, G \) and \( H \) are cells of e.m.f. \( 2 \mathrm{~V} \), \( 1 \ma...

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In the circuit shown \( E, F, G \) and \( H \) are cells of e.m.f. \( 2 \mathrm{~V} \), \( 1 \mathrm{~V}, 3 \mathrm{~V} \) and \( 1 \mathrm{~V} \) respectively and their internal resistances are \( 2 \Omega, 1 \Omega, 3 \Omega \) and \( 1 \Omega \) respectively.
(a) \( V_{D}-V_{B}=-2 / 13 \mathrm{~V} \)
(b) \( V_{D}-V_{B}=2 / 13 \mathrm{~V} \)
(c) \( V_{G}=21 / 13 \mathrm{~V}= \) potential difference across \( G \)
(d) \( V_{H}=19 / 13 \mathrm{~V}= \) potential difference across \( H \)
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