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CBSE 11th Standard Physics Subject HOT Questions 1 Mark Questions With Solution 2021

Published on: 29/05/2021

QB365 Provides the HOT Question Papers for Class 11 Physics, and also provide the detail solution for each and every HOT Questions. HOT Questions will help to get more idea about question pattern in every exams and also will help to get more marks in Exams

Download CBSE Class 11th Standard CBSE Physics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Physics

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Std: 11th Standard CBSE - Physics

chapter: - HOT Questions

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Questions:

Generic 2

10 x 2 = 20

Which object will cool faster when kept in open air, the one at 300 \(^{0}\) C or the one of 100 \(^{0}\)C? Why?

A tightened glass stopper can be taken out easily by pouring hot water around the neck of the bottle. Why?

When we step barefoot into an office with a marble floor, we feel cold. Why?

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?

Work done in moving a particle round a closed path under the action of gravitation force zero. Why?

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?

At what factor between the two particles gravitational force does not depend?

Can the mass of body be taken to be concentrated at its centre of mass for the purpose of calculating its rotational inertia?

Draw position-time graph for a non-uniform motion, when body starts from origin with increasing velocity.

10.

Human heart is an inbuilt clock.comment.

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Answers Key:

Generic 2

10 x 2 = 20

The object at 300^oC will cool faster than the object at 100^oC. 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 neck expands but not the stopper due to poor conductivity of glass. Thus, the stopper can be taken out easily.

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.

The satellite move in air-free regions while the aeroplane has to overcome air resistance.

Gravitational force is a conservative force which means that work done by it, is independent of path followed.

Since, gravitational force is an internal force, therefore the centre of mass would not move.

Gravitational force does not depend upon the medium between the two particles.

No, the moment of inertia greatly depends on the distribution of mass about the axis of rotation.

In the above x-t graph, the slope of x-t graph is increasing, it means that the velocity is increasing.