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Physics XI Notes

Physics XI Notes

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What are centre of buoyancy and metacentre?

What are centre of buoyancy and metacentre?

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1 min read
Hygrometry- Old is Gold

Hygrometry- Old is Gold

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1 min read
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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1 min read
Viscosity-Old is Gold

Viscosity-Old is Gold

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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
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
Photometry- Old is Gold

Photometry- Old is Gold

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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
Why is the kinetic friction less than the limiting friction?

Why is the kinetic friction less than the limiting friction?

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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
Why does ice float in water?

Why does ice float in water?

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1 min read
Reflection at curved mirrors- Old is Gold

Reflection at curved mirrors- Old is Gold

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1 min read
Transfer of heat- Old is Gold

Transfer of heat- Old is Gold

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Dispersion- Old is Gold

Dispersion- Old is Gold

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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 do you understand by viscosity?

What do you understand by viscosity?

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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
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
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
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
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
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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1 min read
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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1 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
Heat and Temperature- Old is Gold

Heat and Temperature- Old is Gold

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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
1. State Newton’s Second Law of Motion.

1. State Newton’s Second Law of Motion.

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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
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
What is meant by elastic and inelastic collision?

What is meant by elastic and inelastic collision?

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1 min read
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
Quantity of Heat- Old is Gold

Quantity of Heat- Old is Gold

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1 min read
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
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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1 min read
Explain why a coin placed on a cardboard covering a glass falls into the glass when the cardboard is pulled to one side?

Explain why a coin placed on a cardboard covering a glass falls into the glass when the cardboard is pulled to one side?

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1 min read
Is friction a necessary evil? Explain.

Is friction a necessary evil? Explain.

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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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1 min read
Explain how Newton’s first law of motion follows from the second law.

Explain how Newton’s first law of motion follows from the second law.

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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
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
Why are roads banked on curved path?

Why are roads banked on curved path?

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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 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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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
Steel balls sink in water but they don’t sink in mercury. Why?

Steel balls sink in water but they don’t sink in mercury. Why?

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1 min read
Why bridges are declared unsafe after a long use?

Why bridges are declared unsafe after a long use?

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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
Can a body be regarded in a state of rest as well as in motion at the same time? Give an example.

Can a body be regarded in a state of rest as well as in motion at the same time? Give an example.

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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 pendulum clock is taken to moon. Will it gain or lose time?

A pendulum clock is taken to moon. Will it gain or lose time?

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1 min read
Physics XI Questions

Physics XI Questions

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10 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
Kinematics-Old is Gold

Kinematics-Old is Gold

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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
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
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
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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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
State the laws of flotation.

State the laws of flotation.

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1 min read
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