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Physics XI Notes

Physics XI Notes

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A solid tied at the end of a string is revolved in vertical. At what point the tension in the string will be the greatest?

A solid tied at the end of a string is revolved in vertical. At what point the tension in the string will be the greatest?

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1 min read
2. If action and reaction are always equal and opposite, why don’t they always cancel each other?

2. If action and reaction are always equal and opposite, why don’t they always cancel each other?

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1 min read
How will you justify that stone is more rigid than iron?

How will you justify that stone is more rigid than iron?

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A body is moving in a circular path with constant speed. Is this motion a simple harmonic?

A body is moving in a circular path with constant speed. Is this motion a simple harmonic?

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If a pendulum clock is taken to a mountain top, does it gain or lose time?

If a pendulum clock is taken to a mountain top, does it gain or lose time?

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1 min read
why do we slip on a rainy day?

why do we slip on a rainy day?

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1 min read
If a moving bullet striking a block of wood on a frictionless table embeds inside it what happens to the KE of the bullet?

If a moving bullet striking a block of wood on a frictionless table embeds inside it what happens to the KE of the bullet?

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The weight of a body is less inside the earth than on the surface. Explain.

The weight of a body is less inside the earth than on the surface. Explain.

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Can a body be in equilibrium if it is in motion? Explain.

Can a body be in equilibrium if it is in motion? Explain.

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A fan with blades takes longer time to come to rest than without the blades. Why?

A fan with blades takes longer time to come to rest than without the blades. Why?

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Why bridges are declared unsafe after a long use?

Why bridges are declared unsafe after a long use?

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NEB Model Question for Physics – Class 11

NEB Model Question for Physics – Class 11

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4 min read
Why is it difficult to run fast on sand?

Why is it difficult to run fast on sand?

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In a siphon, water is lifted above its level during flow from container to another, where does it needed potential energy from?

In a siphon, water is lifted above its level during flow from container to another, where does it needed potential energy from?

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Why a wrench of longer arm is preferred in comparison to a wrench of short arm?

Why a wrench of longer arm is preferred in comparison to a wrench of short arm?

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Why is a horse more stable than a man?

Why is a horse more stable than a man?

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When a heavy truck collides with a car, the occupants of car are more likely to be hurt than the truck driver. Why?

When a heavy truck collides with a car, the occupants of car are more likely to be hurt than the truck driver. Why?

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Electrostatics- Old is Gold

Electrostatics- Old is Gold

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Work

Work

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Why does ice float in water?

Why does ice float in water?

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What are the drawbacks of simple pendulum?

What are the drawbacks of simple pendulum?

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If the earth is struck by meteorites, the earth will slow down slightly. Why?

If the earth is struck by meteorites, the earth will slow down slightly. Why?

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What is the difference between centre of gravity and centre of mass of a system?

What is the difference between centre of gravity and centre of mass of a system?

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How does ‘g’ at a point vary with distance from the centre of the earth? Where is the highest value of ‘g’? Explain.

How does ‘g’ at a point vary with distance from the centre of the earth? Where is the highest value of ‘g’? Explain.

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Why are roads banked on curved path?

Why are roads banked on curved path?

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Hygrometry- Old is Gold

Hygrometry- Old is Gold

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What is the counterpart of the mass and force in rotational motion?

What is the counterpart of the mass and force in rotational motion?

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1. State Newton’s Second Law of Motion.

1. State Newton’s Second Law of Motion.

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Quantity of Heat- Old is Gold

Quantity of Heat- Old is Gold

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Physics XI Questions

Physics XI Questions

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10 min read
How will you make difference between density and specific gravity of a body?

How will you make difference between density and specific gravity of a body?

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1 min read
Why is the bottom of a ship made heavy?

Why is the bottom of a ship made heavy?

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Why is it easy to pull a lawn roller than to push it?

Why is it easy to pull a lawn roller than to push it?

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Why is easier to lift a body in a liquid than in air?

Why is easier to lift a body in a liquid than in air?

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What is meant by the moment of a couple?

What is meant by the moment of a couple?

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What do you understand by viscosity?

What do you understand by viscosity?

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The earth moving round the sun actes upon by a force, the work on earth by this force. Do you agree with this statement?

The earth moving round the sun actes upon by a force, the work on earth by this force. Do you agree with this statement?

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1 min read
A dancer girl is rotating over a turntable with her arms outstretched. If she lowers her arms how does this affect her motion?

A dancer girl is rotating over a turntable with her arms outstretched. If she lowers her arms how does this affect her motion?

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Transfer of heat- Old is Gold

Transfer of heat- Old is Gold

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If a cork is released from the bottom of a jar filled with water, what will happen and why?

If a cork is released from the bottom of a jar filled with water, what will happen and why?

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1 min read
A helium filled balloon rises to a certain height and then halts. Why?

A helium filled balloon rises to a certain height and then halts. Why?

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Refraction through prisms- Old is Gold

Refraction through prisms- Old is Gold

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Is it possible for a solid body to have no matter at it centre of gravity?

Is it possible for a solid body to have no matter at it centre of gravity?

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If the sun somehow collapsed to form a black hole, what effect would this event have on the orbit of the earth?

If the sun somehow collapsed to form a black hole, what effect would this event have on the orbit of the earth?

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On what factors does the time period of a simple pendulum depend?

On what factors does the time period of a simple pendulum depend?

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3. Explain why a cricketer moves his hands backwards while catching ball?

3. Explain why a cricketer moves his hands backwards while catching ball?

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1 min read
Heat and Temperature- Old is Gold

Heat and Temperature- Old is Gold

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Suppose two forces act on rigid body and two forces have same magnitude but opposite direction. what conditions the body rotate?

Suppose two forces act on rigid body and two forces have same magnitude but opposite direction. what conditions the body rotate?

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A man carrying a bucket of water on his hand always leans to the opposite side. Explain.

A man carrying a bucket of water on his hand always leans to the opposite side. Explain.

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Why an astronaut in a space capsule orbiting the earth experiences a feeling of weightlessness?

Why an astronaut in a space capsule orbiting the earth experiences a feeling of weightlessness?

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What will happen to the value of ‘g’ if the earth stops rotating?

What will happen to the value of ‘g’ if the earth stops rotating?

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Does a ship sink more in river water or in sea water? Explain.

Does a ship sink more in river water or in sea water? Explain.

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Why is the kinetic friction less than the limiting friction?

Why is the kinetic friction less than the limiting friction?

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Reflection at curved mirrors- Old is Gold

Reflection at curved mirrors- Old is Gold

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Dispersion- Old is Gold

Dispersion- Old is Gold

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What do you mean by geo-stationary satellite? Explain?

What do you mean by geo-stationary satellite? Explain?

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Photometry- Old is Gold

Photometry- Old is Gold

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When a bus takes a turn, passengers are thrown away from the centre of the curved path. Why?

When a bus takes a turn, passengers are thrown away from the centre of the curved path. Why?

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Capacitance and dielectrics- Old is Gold

Capacitance and dielectrics- Old is Gold

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A rigid, lighter than air balloon filled with Helium cannot continue to rise indefinitely. Why?

A rigid, lighter than air balloon filled with Helium cannot continue to rise indefinitely. Why?

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1 min read
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