When two identical cells are connected either in series or in parallel across \( 2 \mathrm{ohm} ...

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When two identical cells are connected either in series or in parallel across \( 2 \mathrm{ohm} \)  resistor they send the same current through it. The internal resistance of each cell is
a. \( 2 \mathrm{ohm} \)
b. \( 1.2 \mathrm{ohm} \)
c. \( 12 \mathrm{ohm} \)
d. \( 21 \mathrm{ohm} \)
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