| 1. | Life of the Edison cell is at least ? | |
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five years
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eight years
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seven years
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ten years
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Report Question| 2. | The watt-hour efficiency of a lead-acid cell varies between ? | |
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26 to 36%
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40 to 60%
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70 to 80%
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90 to 95%
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| 3. | Proper charging rate of a battery in ampere is about ...... of its ampere-hour capacity ? | |
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1/4
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1/6
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1/4
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1/2
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| 4. | Satellite power requirement is provided through ? | |
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solar cells
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dry cells
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Nickel cadmium cells
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lead-acid batteries
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| 5. | The open-circuit e.m.f. of a storage cell is 2.2 V. The terminal voltage measured when current is 6 A is found to.be 1.98 V. The internal resistance of the cell is ? | |
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0.00366 ?
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0.0366 ?
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0.366 ?
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3.66 ?
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| 6. | A cell which is used as a voltage reference source for instrument calibration is ? | |
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dry cell
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solar cell
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mercury-cadmium cell
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nickel-cadmium cell
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| 7. | Local action in a battery is indicated by ? | |
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excessive gassing under load conditions
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excessive drop in the specific gravity of electrolyte even when the cell is on open circuit
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both (a) and (b)
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none of the above
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| 8. | If a battery is wrongly connected on charge following will happen ? | |
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current delivered by the battery will be high
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current drawing will be nil
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current drawing will be very small
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current drawing will be very high
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| 9. | Life of the batteries is in the following ascending order ? | |
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Lead-acid cell, Edison cell, Nickel cadmium cell
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Lead-acid cell, Nickel-cadmium cell, Edison cell
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Edison cell, Nickel-cadmium cell, lead-acid cell
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Nickel-cadmium cell, Edison cell, lead-acid cell
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| 10. | Internal resistance of a cell is reduced by ? | |
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using vent plug to permit gas formed during discharge
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increasing the plate area
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putting plates very close together
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all above methods
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