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Physics

Physics
Who defined the law of gravitation ?

Faraday
Archimedes
Newton
Galileo

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Physics
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 :

0.12638888888889
0.21111111111111
0.20902777777778
0.12777777777778

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Physics
Universal gates are

AND and OR
OR and NOT
AND and XOR
NAND and NOR

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Physics
Electrical burns occur principally because of

The heat generated by the flow of electrical current through the body
All of these
The high energy of electrons
Radiation pulses of the electricity

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Physics
The device used for measuring the wavelength of X-rays is

G.M. Counter
Bragg Spectrometer
Cyclotron
Mass Spectrometer

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Physics
The boiling point of liquids vary as

Temperature varies
Density varies
Volume varies
Pressure varies

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