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89 questions
21 Electric current Moderate
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Advice which converts electrical energy into mechanical energy is –
22 Electric current Moderate
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In electrical motor :
23 Electric current Moderate
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The device which works on the principle of electromagnetic induction is
24 Electric current Moderate
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A device which converts chemical energy into electrical energy is called –
25 Electric current Moderate
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Electric motors operating at low voltages tend to burn out because they draw more current which is inversely proportional to the voltage.
26 Electric current Moderate
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Faraday constant :
27 Electric current Moderate
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Consider the following statements regarding a motor car battery - 1. The voltage is usually 12 V. 2. Electrolyte used is hydrochloric acid. 3. Electrodes are lead and copper. 4. Capacity is expressed in ampere-hour. Which of the above statements are correct ?
28 Electric current Moderate
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Nickel-Cadmium (Ni-Cd) battery is used in :
29 Electric current Moderate
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Which of the following metals is used as filament in lighting bulbs?
30 Electric current Moderate
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The filament of an electric bulb is made of –