Transistors are mainly
(a) Electricity-powered devices
(b) Current-powered devices
(c) voltage-powered devices
(d) resistance-powered devices
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A cuboid has __________ edges. (a) 4 (b) 8 (c) 16 (d) 12
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Richter Scale is used to measure (1) Temperature of the body (2) Intensity of wind (3) Earthquakes (4) Ocean depth
Two candles of the same length but different thickness are lighted simultaneously. The thicker candle is supposed to burn for six hours while the thinner one is to last for two hours less. How many hours after they are lighted, the thicker candle will be double the length of the other one ? (a) 1 hour (b) 2 hours (c) 3 hours (d) 4 hours
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A photoelectric cell converts (a) Light energy to thermal energy (b) Light energy to sound energy (c) Light energy to electrical energy (d) Electrical energy to light energy
How much data can be contained in 3 ? inch floppy ? (a) 1.2 MB (b) 2.4 MB (c) 1.4 MB (d) None of these
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If w is the cubic root of the unit and n, a multiple of 3, then 1 + wn +2wn is equal to (1) 3 (2) 2 (3) 1 (4) 0