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Physics XI Notes

Physics XI Notes

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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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1 min read
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
Transfer of heat- Old is Gold

Transfer of heat- Old is Gold

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1 min read
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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1 min read
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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1 min read
During pregnancy, woman often develop back pains from leaning backward while walking. Why do they have to walk this way?

During pregnancy, woman often develop back pains from leaning backward while walking. Why do they have to walk this way?

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1 min read
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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1 min read
Thermal Properties of Matter- Old is Gold

Thermal Properties of Matter- Old is Gold

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1 min read
What do you mean by geo-stationary satellite? Explain?

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

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1 min read
Why is a cow more stable than a man?

Why is a cow more stable than a man?

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1 min read
Lenses – Old is Gold

Lenses – Old is Gold

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1 min read
Distinguish between conservative and non-conservative force.

Distinguish between conservative and non-conservative force.

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

Why is it difficult to run fast on sand?

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1 min read
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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1 min read
State the laws of flotation.

State the laws of flotation.

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Dispersion- Old is Gold

Dispersion- Old is Gold

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Viscosity-Old is Gold

Viscosity-Old is Gold

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1 min read
Photometry- Old is Gold

Photometry- Old is Gold

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1 min read
What do you understand by viscosity?

What do you understand by viscosity?

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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
What is meant by the moment of a couple?

What is meant by the moment of a couple?

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1 min read
Explain why a cyclist bend while going along curved road?

Explain why a cyclist bend while going along curved road?

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1 min read
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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1 min read
Refraction through prisms- Old is Gold

Refraction through prisms- Old is Gold

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1 min read
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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1 min read
Explain why the moon has no atmosphere?

Explain why the moon has no atmosphere?

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1 min read
Second Law of Thermodynamics- Old is Gold

Second Law of Thermodynamics- Old is Gold

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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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1 min read
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
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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1 min read
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
NEB Model Question for Physics – Class 11

NEB Model Question for Physics – Class 11

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4 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
Explain why spokes are fitted in the cycle wheel.

Explain why spokes are fitted in the cycle wheel.

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1 min read
Hygrometry- Old is Gold

Hygrometry- Old is Gold

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1 min read
Is friction a necessary evil? Explain.

Is friction a necessary evil? Explain.

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1 min read
Work

Work

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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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1 min read
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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1 min read
Kinematics-Old is Gold

Kinematics-Old is Gold

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1 min read
Why is Glycerine more viscous than water?

Why is Glycerine more viscous than water?

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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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1 min read
Quantity of Heat- Old is Gold

Quantity of Heat- Old is Gold

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1 min read
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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1 min read
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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1 min read
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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1 min read
What are centre of buoyancy and metacentre?

What are centre of buoyancy and metacentre?

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1 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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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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1 min read
Refraction at plane surfaces- Old is Gold

Refraction at plane surfaces- Old is Gold

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1 min read
What is meant by elastic and inelastic collision?

What is meant by elastic and inelastic collision?

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1 min read
Units in different systems

Units in different systems

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3 min read
Differentiate between conservation of kinetic energy and conservation of linear momentum.

Differentiate between conservation of kinetic energy and conservation of linear momentum.

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1 min read
Optical instruments- Old is Gold

Optical instruments- Old is Gold

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1 min read
Why does ice float in water?

Why does ice float in water?

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1 min read
The leaves fall when a tree is shaken. Give reason.

The leaves fall when a tree is shaken. Give reason.

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1 min read
1. State Newton’s Second Law of Motion.

1. State Newton’s Second Law of Motion.

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1 min read
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
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