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.

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?

Transfer of heat- Old is Gold

Transfer of heat- Old is Gold

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?

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?

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?

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?

Thermal Properties of Matter- Old is Gold

Thermal Properties of Matter- Old is Gold

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

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

Why is a cow more stable than a man?

Why is a cow more stable than a man?

Lenses – Old is Gold

Lenses – Old is Gold

Distinguish between conservative and non-conservative force.

Distinguish between conservative and non-conservative force.

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?

Why is it difficult to run fast on sand?

Why is it difficult to run fast on sand?

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

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

State the laws of flotation.

State the laws of flotation.

Dispersion- Old is Gold

Dispersion- Old is Gold

Viscosity-Old is Gold

Viscosity-Old is Gold

Photometry- Old is Gold

Photometry- Old is Gold

What do you understand by viscosity?

What do you understand by viscosity?

why do we slip on a rainy day?

why do we slip on a rainy day?

What is meant by the moment of a couple?

What is meant by the moment of a couple?

Explain why a cyclist bend while going along curved road?

Explain why a cyclist bend while going along curved road?

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?

Refraction through prisms- Old is Gold

Refraction through prisms- Old is Gold

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?

Explain why the moon has no atmosphere?

Explain why the moon has no atmosphere?

Second Law of Thermodynamics- Old is Gold

Second Law of Thermodynamics- Old is Gold

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?

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?

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.

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?

NEB Model Question for Physics – Class 11

NEB Model Question for Physics – Class 11

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?

Explain why spokes are fitted in the cycle wheel.

Explain why spokes are fitted in the cycle wheel.

Hygrometry- Old is Gold

Hygrometry- Old is Gold

Is friction a necessary evil? Explain.

Work

Work

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.

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?

Kinematics-Old is Gold

Kinematics-Old is Gold

Why is Glycerine more viscous than water?

Why is Glycerine more viscous than water?

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?

Quantity of Heat- Old is Gold

Quantity of Heat- Old is Gold

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?

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?

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?

What are centre of buoyancy and metacentre?

What are centre of buoyancy and metacentre?

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?

Why is the bottom of a ship made heavy?

Why is the bottom of a ship made heavy?

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

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

Refraction at plane surfaces- Old is Gold

Refraction at plane surfaces- Old is Gold

What is meant by elastic and inelastic collision?

What is meant by elastic and inelastic collision?

Units in different systems

Units in different systems

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

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

Optical instruments- Old is Gold

Optical instruments- Old is Gold

Why does ice float in water?

Why does ice float in water?

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

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

1. State Newton’s Second Law of Motion.

1. State Newton’s Second Law of Motion.

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