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Physics

Physics
Permissible noise level at Residential area during night time is :

80 dB (A)
75 dB (A)
45 dB (A)
55 dB (A)

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Physics
Water cannot be used to extinguish fire caused by electric current, because

It may cause electrolysis
It may spoil the wiring
It may cause hydrolysis
It may cause electrocution

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Physics
The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 127.5 V ?

0.41666666666667
24 A
8.5 A

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Physics
Mud houses are cooler in summers and warmer in winters as compared to brick houses because

Mud is a good conductor
Mud is a bad conductor
Evaporation of water causes cooling in summers and sunlight coming through holes causes warming in winters
Mud is a poor insulator

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Physics
Acceleration is the rate of change of

Jounce
Velocity
Jerk
Speed

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Physics
Who defined the law of gravitation ?

Archimedes
Galileo
Faraday
Newton

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MORE MCQ ON Physics

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