One of the following readings represents the measurement of thelength of a metal rod using vernier callipers. Taking the reading accuracy into consideration, the most likely one is
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2020
A solid weighs 4.8g in air, 2.8g in water and 3.2g in Kerosine. The ratio of density of the solid to that of the kerosine is
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2020
A transformer has 300 turns of wire in the primary coil and 30 turns in the secondary coil. If the input voltage is 100 volts, the output voltage is
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2020
Tha mass of a proton is approximately equal to that of
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2020
What is the cost of running five 50W lamps and four 100W lamps for 10 hours if electrical energy costs 2 Kobo per KWh?
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2020
Which of the following can be described as high tension transmission?
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2020
If a source of solid is moving, a stationary listener will hear a sound of different frequency. This is called?
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2020
Natural radioactivity consists of emission?
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2020
Which of the following statements on the use of X-rays is incorrect? X-rays are used
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2020
The effect of closing the key K in the circuit shown in the figure above would be to?
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2020
In the study of Physics, temperature and heat are often confused with each other. Which of the following statements correctly defines these two elements?
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2020
Which of the following statements about radioactivity is true?(i) Alpha particle is positively charged(ii)Beta particle is negativelycharged(iii) Gamma ray is neutral(iv) Beta particle has thesame massas helium atom(v) G…
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2020
In what range oftemperature is the expansion of water anomalous?
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2020
If in a simple pendulum experiment the length of the inextensible string is increased by a factor offour, its period is increased by a factor of?
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2020
A machine gun with a mass of 5kg fires a 50g bullet at a speed of 100 ms\(^{-1}\). The recoil speed of the machine gun is
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2020
The force required to make an object of mass m, travelling with velocity v, turn in a circle of radius r is
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2020
A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action isdue to?