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Free Online Mock Physics Multiple Choice Test on Electricity effects
Sub Category : Electricity effects Test : 1 Time Left :
1) One kilowatt hour is equal to(1) 36 Ã- 10 power5 J (2) 36 Ã- 10 power3 (3) 10 power5 J (4) 10 power3J
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2) If R1 and R2 are respectively the filament resistance of 200 watt bulb and a 100 watt bulb designed to operate on same voltage then(1) R2 = 2R1 (2) R1 + 2 R2 (3) R2 = 4R1 (4) R1 = 4R2
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3) Forty electric bulbs are connected in series across a 220 V supply. After one bulb is fused, the remaining 39 are connected again in series across the same supply. The illumination will be(1) More with 39 bulbs than with 40 (2) More with 40 bulbs than with 39 (3) Equal in both the cases (4) In the ration of (40)2: (39)2
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4) The material of fuse wire should have
(1) A high specific resistance and low melting point (2) A high specific resistance and high melting point (3) A low specific resistance and low melting point (4) A low specific resistance and high melting point
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5)The element of an electric heater is made of
(1) Nichrome (2) Platinum (3) Copper (4) Tungsten
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