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89 questions
21
Electric current
Moderate
+1.0
-0.25
Advice which converts electrical energy into mechanical energy is –
22
Electric current
Moderate
+1.0
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In electrical motor :
23
Electric current
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The device which works on the principle of electromagnetic induction is
24
Electric current
Moderate
+1.0
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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
+1.0
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Faraday constant :
27
Electric current
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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
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Which of the following metals is used as filament in lighting bulbs?
30
Electric current
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The filament of an electric bulb is made of –