Gowebrachnasagar com Class 10 ICSE Physics. We covered all the Gowebrachnasagar com Class 10 ICSE Physics in this post for free so that you can practice well for the exam.
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Class 10 ICSE Physics MCQs for Students
According to Newton’s law of cooling rate of loss of heat by a body is directly proportional to
(A) the Temperature of the surrounding
(B) the Temperature of the body if the temperature difference is small
(C) the difference between the temperature of the body and the temperature of the surroundings if the temperature difference is small
(D) the Fourth power of the absolute temperature of the body
Option c – the difference between the temperature of the body and the temperature of the surroundings if the temperature difference is small
If the temperature of a hot body is increased by 50%, the amount of radiation emitted by it increases approximately by :
(A) 225 %
(B) 250 %
(C) 400 %
(D) 500 %
Option c – 400 %
The velocity of heat radiation in a vacuum is :
(A) Equal to that of light
(B) Less than that of light
(C) Greater than that of light
(D) Equal to that of sound
Option a – Equal to that of light
A piece of metal and a piece of wood are kept at a temperature of 45 °C on touching the two with a hand :
(A) The two will appear equally hot
(B) The piece of wood will appear hotter than the piece of metal
(C) The piece of metal will appear hotter than the piece of wood
(D) The distinction in the hotness will not be possible
Option c – The piece of metal will appear hotter than the piece of wood
The flow of heat from a hot body to a cold body is an example of
(A) Isothermal process
(B) Adiabatic process
(C) Reversible process
(D) Irreversible process
Option d – Irreversible process
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