Natural radioactivity was discovered by
Answer: C
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If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this ?
Answer: D
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The Hydraulic Break works on the principle of _____ ?
Answer: A
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Ohmic conductor among the following is _____.
Answer: C
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Which law is also called the law of inertia ?
Answer: A
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An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
Answer: C
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A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is :
Answer: D
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Stars twinkle because
Answer: C
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The capacity of a pure capacitor is 1 farad. In D.C circuit, its effective resistance will be
Answer: B
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Two electric bulbs marked 25W ? 220V and 100W ? 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
Answer: A
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