A current of \( 0.9 \mathrm{~A} \) flows through \( 2 \Omega \) res...

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A current of \( 0.9 \mathrm{~A} \) flows through \( 2 \Omega \) resistor and \( 0.3 \mathrm{~A} \) through \( 7 \Omega \) resistor when they are separately conected across a cell. The internal resistance of the cell is
(1) \( 0.5 \Omega \)
(2) \( 1.0 \Omega \)
(3) \( 1.2 \Omega \)
(4) \( 2.0 \Omega \)
\( \mathrm{P} \)
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