91. If a copper wire is increased to double its length, its resistance will become
92. The filament of electric bulb is made up of :
93. Full form of CFL used in place of electric bulbs is
94. Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
95. 1 WH =
96. The electrical domestic tube light gives white fluorescent light because of
97. The unit for measuring electric power is the
98. The device used to change the speed of an electric fan is
99. The material used in electric heater is
100. After long periods of use, a grey spot develops on the inside of a bulb. This is because
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