CELLS AND COMBINATION OF CELLS
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Current Electricity

268390 The emf of a Daniel cell is \(1.08 \mathrm{~V}\). When the terminals of the cells are connected to a resistance of \(3 \Omega\), the potential difference across the erminlas is found to be \(0.6 \mathrm{~V}\). Then the internal resistance of the cell is

1 \(1.8 \Omega\)
2 \(2.4 \Omega\)
3 \(3.24 \Omega\)
4 \(0.2 \Omega\)
Current Electricity

268391 Four cells each of emf \(2 \mathrm{~V}\) and internal resistance 1 ohm are connected in parallel with an external resistance of 6 ohm. The current in the external resistance is

1 \(0.32 \mathrm{~A}\)
2 \(0.16 \mathrm{~A}\)
3 \(0.2 \mathrm{~A}\)
4 \(0.6 \mathrm{~A}\)
Current Electricity

268392 A student is asked to connected four cells of emf of \(1 \mathrm{~V}\) and internal resistance \(0.5 \mathrm{ohm}\) in series with an external resistance of 1 ohm. B ut one cell is wrongly connected by him with its terminal reversed, the current in thecircuit is

1 \(\frac{1}{3} \mathrm{~A}\)
2 \(\frac{2}{3} A\)
3 \(\frac{3}{4} A\)
4 \(\frac{4}{3} A\)
Current Electricity

268393 Two cells of emf \(1.25 \mathrm{~V}, 0.75 \mathrm{~V}\) and each of internal resistance \(1 \Omega\) are connected in parallel. The effective emf will be

1 \(1 \mathrm{~V}\)
2 \(1.25 \mathrm{~V}\)
3 \(2 \mathrm{~V}\)
4 \(0.5 \mathrm{~V}\)
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Current Electricity

268390 The emf of a Daniel cell is \(1.08 \mathrm{~V}\). When the terminals of the cells are connected to a resistance of \(3 \Omega\), the potential difference across the erminlas is found to be \(0.6 \mathrm{~V}\). Then the internal resistance of the cell is

1 \(1.8 \Omega\)
2 \(2.4 \Omega\)
3 \(3.24 \Omega\)
4 \(0.2 \Omega\)
Current Electricity

268391 Four cells each of emf \(2 \mathrm{~V}\) and internal resistance 1 ohm are connected in parallel with an external resistance of 6 ohm. The current in the external resistance is

1 \(0.32 \mathrm{~A}\)
2 \(0.16 \mathrm{~A}\)
3 \(0.2 \mathrm{~A}\)
4 \(0.6 \mathrm{~A}\)
Current Electricity

268392 A student is asked to connected four cells of emf of \(1 \mathrm{~V}\) and internal resistance \(0.5 \mathrm{ohm}\) in series with an external resistance of 1 ohm. B ut one cell is wrongly connected by him with its terminal reversed, the current in thecircuit is

1 \(\frac{1}{3} \mathrm{~A}\)
2 \(\frac{2}{3} A\)
3 \(\frac{3}{4} A\)
4 \(\frac{4}{3} A\)
Current Electricity

268393 Two cells of emf \(1.25 \mathrm{~V}, 0.75 \mathrm{~V}\) and each of internal resistance \(1 \Omega\) are connected in parallel. The effective emf will be

1 \(1 \mathrm{~V}\)
2 \(1.25 \mathrm{~V}\)
3 \(2 \mathrm{~V}\)
4 \(0.5 \mathrm{~V}\)
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Current Electricity

268390 The emf of a Daniel cell is \(1.08 \mathrm{~V}\). When the terminals of the cells are connected to a resistance of \(3 \Omega\), the potential difference across the erminlas is found to be \(0.6 \mathrm{~V}\). Then the internal resistance of the cell is

1 \(1.8 \Omega\)
2 \(2.4 \Omega\)
3 \(3.24 \Omega\)
4 \(0.2 \Omega\)
Current Electricity

268391 Four cells each of emf \(2 \mathrm{~V}\) and internal resistance 1 ohm are connected in parallel with an external resistance of 6 ohm. The current in the external resistance is

1 \(0.32 \mathrm{~A}\)
2 \(0.16 \mathrm{~A}\)
3 \(0.2 \mathrm{~A}\)
4 \(0.6 \mathrm{~A}\)
Current Electricity

268392 A student is asked to connected four cells of emf of \(1 \mathrm{~V}\) and internal resistance \(0.5 \mathrm{ohm}\) in series with an external resistance of 1 ohm. B ut one cell is wrongly connected by him with its terminal reversed, the current in thecircuit is

1 \(\frac{1}{3} \mathrm{~A}\)
2 \(\frac{2}{3} A\)
3 \(\frac{3}{4} A\)
4 \(\frac{4}{3} A\)
Current Electricity

268393 Two cells of emf \(1.25 \mathrm{~V}, 0.75 \mathrm{~V}\) and each of internal resistance \(1 \Omega\) are connected in parallel. The effective emf will be

1 \(1 \mathrm{~V}\)
2 \(1.25 \mathrm{~V}\)
3 \(2 \mathrm{~V}\)
4 \(0.5 \mathrm{~V}\)
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Current Electricity

268390 The emf of a Daniel cell is \(1.08 \mathrm{~V}\). When the terminals of the cells are connected to a resistance of \(3 \Omega\), the potential difference across the erminlas is found to be \(0.6 \mathrm{~V}\). Then the internal resistance of the cell is

1 \(1.8 \Omega\)
2 \(2.4 \Omega\)
3 \(3.24 \Omega\)
4 \(0.2 \Omega\)
Current Electricity

268391 Four cells each of emf \(2 \mathrm{~V}\) and internal resistance 1 ohm are connected in parallel with an external resistance of 6 ohm. The current in the external resistance is

1 \(0.32 \mathrm{~A}\)
2 \(0.16 \mathrm{~A}\)
3 \(0.2 \mathrm{~A}\)
4 \(0.6 \mathrm{~A}\)
Current Electricity

268392 A student is asked to connected four cells of emf of \(1 \mathrm{~V}\) and internal resistance \(0.5 \mathrm{ohm}\) in series with an external resistance of 1 ohm. B ut one cell is wrongly connected by him with its terminal reversed, the current in thecircuit is

1 \(\frac{1}{3} \mathrm{~A}\)
2 \(\frac{2}{3} A\)
3 \(\frac{3}{4} A\)
4 \(\frac{4}{3} A\)
Current Electricity

268393 Two cells of emf \(1.25 \mathrm{~V}, 0.75 \mathrm{~V}\) and each of internal resistance \(1 \Omega\) are connected in parallel. The effective emf will be

1 \(1 \mathrm{~V}\)
2 \(1.25 \mathrm{~V}\)
3 \(2 \mathrm{~V}\)
4 \(0.5 \mathrm{~V}\)
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