# Objective Questions on Series Parallel Battery Cells

1. The best instrument for the measurement of emf of a cell is

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2. In a flash light three dry cells (emf 1.5 V each) are in series with a 1.5 ohm lamp. If each cell has an internal resistance of 0.25 ohm, the potential difference across the lamp will be

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3. A battery whose emf is 45 volts is connected to a 20 ohm resistance and a electric current of 2.1 Amp flows. The terminal voltage is

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4. A experimenter connects four 0.25 ohm cells in series but one cell is wrongly connected with its terminals reversed. The external resistance is 1 ohm. If the each cell has emf of 1.5 V, the electric current flowing is

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5. When cells are connected in parallel grouping, then

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6. For a voltage source when internal resistances Rs, load resistance Rl, which of the following is maximum ?

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7. The capacity of storage battery is expressed as

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8. Internal resistance of a battery is due to

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9. Two cells are connected in series to form a battery . Their internal resistance is 0.1 ohm. The internal resistance of the battery will be

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10. When n cells each of emf E volts and internal resistance r ohms are connected in parallel, the strength of the electric current i is given by

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11. For a group of cells when internal resistance of group is equal to the external resistance due to load, the battery will give

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12. A set of battery have terminal voltage of 1, 3, 5 and 7 volts. How many integer values of terminal voltages can be obtained by appropriate connection ?

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13. Two battery , each having emf E, are connected in series. The combination is connected to an external variable resistor R. If the internal resistance of the battery is r1 and r2 respectively, then the terminal voltage across the first cell (internal resistance r1 ) will be zero when

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14. What is the arrangement to get the maximum electric current in 3Ω resistance in case of 24 cells, each of internal resistance 2Ω?

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15. Four dry cells having emfs 1.50, 1.30, 1.35, 1.40 volts and resistances 0.3, 0.4, 0.2, 0.1 ohms, are connected in series to operate a relay having resistance of 10 ohms. The relay electric current is

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16. A battery cell having an emf of 2.2 volts and an internal resistance of 0.03 Ω is connected to an external resistance of 0.10 Ω. The electric current drawn from the battery could be

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17. In above problem, the power lost in battery was nearly

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18. It has been found that internal resistance of a cell is comparable to external resistance. We wish to have maximum electric current through the external resistance. We should combine the cells in

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19. A 45 V source with an internal resistance of 1.5 ohm is connected across a wire wound resistor. Maximum power will be dissipated on the resistor when its R is

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20. A parallel connected battery of 1.5 V cells is to supply electric current to a 0.15 ohm resistor. If each cell can supply a maximum electric current of 1 A, determine the number of cell required

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