Q581
Open questionWater cannot be used to extinguish fire caused by electric current, because
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Q582
Open questionBrightness of bulb depends on voltage or current?
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Q583
Open questionThe resistance of a conductor is inversely proportional to its:
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Q584
Open questionWhich one of the following is an ohmic conductor?
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Q585
Open questionWhat is the effective resistance (in Ω) of two resistors 20 Ω and 30 Ω connected in parallel?
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Q586
Open questionWhich elements are malleable and good conductors of electricity?
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Q587
Open questionWhat is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?
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Q588
Open questionIf electric resistance is to be decreased, then the number of resistances should be connected in ________
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Q589
Open questionAmpere second could be the unit of
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Q590
Open questionWhich one of the following is a good electrical conductor?
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Q591
Open questionIf a copper wire is increased to double its length, its resistance will become
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Q592
Open questionThe filament of electric bulb is made up of :
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Q593
Open questionFull form of CFL used in place of electric bulbs is
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Q594
Open questionTwo electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
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Q595
Open question1 WH =
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Q596
Open questionThe electrical domestic tube light gives white fluorescent light because of
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Q597
Open questionThe unit for measuring electric power is the
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Q598
Open questionThe device used to change the speed of an electric fan is
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Q599
Open questionThe material used in electric heater is
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Q600
Open questionAfter long periods of use, a grey spot develops on the inside of a bulb. This is because
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