30. The potential difference in open circuit for a cell is 2.2 volts. When a 4-ohm resistor is connected between its two electrodes the potential difference becomes 2 volts. The internal resistance of the cell will be
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The potential difference in open circuit for a cell is 2.2V . When a 4Ω resistor is connected between its electrodes the potential difference becomes 2V . The internal resistance of the cell will be: ... D) 0.4Ω
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