Physics In a refrigerator what produces the cooling ? The evaporation of a volatile liquid The ice which deposits on the freezer None of these The sudden expansion of a compressed gas The evaporation of a volatile liquid The ice which deposits on the freezer None of these The sudden expansion of a compressed gas ANSWER DOWNLOAD EXAMIANS APP
Physics A galvanometer can be converted into a voltmeter by connecting with it a High resistance in parallel Low resistance in series Low resistance on parallel High resistance on series High resistance in parallel Low resistance in series Low resistance on parallel High resistance on series ANSWER DOWNLOAD EXAMIANS APP
Physics The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes? 1.0479166666667 0.21041666666667 2.0958333333333 0.12847222222222 1.0479166666667 0.21041666666667 2.0958333333333 0.12847222222222 ANSWER DOWNLOAD EXAMIANS APP
Physics A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be > P P < P 2P > P P < P 2P ANSWER DOWNLOAD EXAMIANS APP
Physics Which microscope is often used to view metal surfaces? Scanning tunneling microscopes Optical microscopes Electron microscopes None of these Scanning tunneling microscopes Optical microscopes Electron microscopes None of these ANSWER DOWNLOAD EXAMIANS APP
Physics Hot water is poured simultaneously in four metallic tumblers painted outside with different points. After some time the water will be found to have cooled most in the tumbler painted. Rough white Shining white Shining black Rough black Rough white Shining white Shining black Rough black ANSWER DOWNLOAD EXAMIANS APP
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