CBSE 11th Standard Physics Subject HOT Questions 1 Mark Questions 2021
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CBSE 11th Standard Physics Subject HOT Questions 1 Mark Questions 2021
11th Standard CBSE
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Reg.No. :
Physics
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Draw position-time graph for a non-uniform motion, when body starts from origin with increasing velocity.
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Can the mass of body be taken to be concentrated at its centre of mass for the purpose of calculating its rotational inertia?
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At what factor between the two particles gravitational force does not depend?
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Two particles of masses m1 and m2 attract each other gravitationally and are set in motion under the influence of the gravitational force? Will the centre of mass move?
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Work done in moving a particle round a closed path under the action of gravitation force zero. Why?
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An artificial satellite revolving around the earth does not need any fuel.On the other hand,the aeroplane requires fuel to fly at certain height why?
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When we step barefoot into an office with a marble floor, we feel cold. Why?
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A tightened glass stopper can be taken out easily by pouring hot water around the neck of the bottle. Why?
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Which object will cool faster when kept in open air, the one at 300 \(^{0}\) C or the one of 100 \(^{0}\)C? Why?
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If there are f degrees of freedom with n moles of a gas, then find the internal energy possessed at a temperature T.
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CBSE 11th Standard Physics Subject HOT Questions 1 Mark Questions 2021 Answer Keys
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In the above x-t graph, the slope of x-t graph is increasing, it means that the velocity is increasing.
In the above x-t graph, the slope of x-t graph is increasing, it means that the velocity is increasing. -
No, the moment of inertia greatly depends on the distribution of mass about the axis of rotation.
No, the moment of inertia greatly depends on the distribution of mass about the axis of rotation.
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Gravitational force does not depend upon the medium between the two particles.
Gravitational force does not depend upon the medium between the two particles.
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Since, gravitational force is an internal force, therefore the centre of mass would not move.
Since, gravitational force is an internal force, therefore the centre of mass would not move.
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Gravitational force is a conservative force which means that work done by it, is independent of path followed.
Gravitational force is a conservative force which means that work done by it, is independent of path followed.
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The satellite move in air-free regions while the aeroplane has to overcome air resistance.
The satellite move in air-free regions while the aeroplane has to overcome air resistance.
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This is because marble is a better conductor of heat than concrete. When we walk barefooted on a marble floor, heat flows our body through the feet and we feel cold.
This is because marble is a better conductor of heat than concrete. When we walk barefooted on a marble floor, heat flows our body through the feet and we feel cold.
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The neck expands but not the stopper due to poor conductivity of glass. Thus, the stopper can be taken out easily.
The neck expands but not the stopper due to poor conductivity of glass. Thus, the stopper can be taken out easily.
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The object at 300oC will cool faster than the object at 100oC. This is in accordance with Newton’s law of cooling. As we know, rate cooling of an object α temperature between the object and its surroundings.
The object at 300oC will cool faster than the object at 100oC. This is in accordance with Newton’s law of cooling. As we know, rate cooling of an object α temperature between the object and its surroundings.
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For 1 mole with f degrees of freedom,
Internal energy, U = 1 x Cv x T = f2/RT
For n moles, U = nCvT = nf2/RTFor 1 mole with f degrees of freedom,
Internal energy, U = 1 x Cv x T = f2/RT
For n moles, U = nCvT = nf2/RT
