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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
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
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
Kinematics-Old is Gold

Kinematics-Old is Gold

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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 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
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
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
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
Capacitance and dielectrics- Old is Gold

Capacitance and dielectrics- Old is Gold

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1 min read
Physics XI Questions

Physics XI Questions

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10 min read
Refraction through prisms- Old is Gold

Refraction through prisms- Old is Gold

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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
What are the drawbacks of simple pendulum?

What are the drawbacks of simple pendulum?

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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
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
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
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
State the laws of flotation.

State the laws of flotation.

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1 min read
Work

Work

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1 min read
Units in different systems

Units in different systems

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3 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
What is meant by elastic and inelastic collision?

What is meant by elastic and inelastic collision?

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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
Hygrometry- Old is Gold

Hygrometry- 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 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
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
Distinguish between conservative and non-conservative force.

Distinguish between conservative and non-conservative force.

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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
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
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
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
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
Is friction a necessary evil? Explain.

Is friction a necessary evil? Explain.

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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
Dispersion- Old is Gold

Dispersion- Old is Gold

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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
Electrostatics- Old is Gold

Electrostatics- Old is Gold

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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
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
Lenses – Old is Gold

Lenses – Old is Gold

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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
NEB Model Question for Physics – Class 11

NEB Model Question for Physics – Class 11

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4 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
Refraction at plane surfaces- Old is Gold

Refraction at plane surfaces- 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 are centre of buoyancy and metacentre?

What are centre of buoyancy and metacentre?

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1 min read
Viscosity-Old is Gold

Viscosity-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
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
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 a cow more stable than a man?

Why is a cow more stable than a man?

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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
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
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
1. State Newton’s Second Law of Motion.

1. State Newton’s Second Law of Motion.

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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
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
Surface Tension-Old is Gold

Surface Tension-Old is Gold

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1 min read
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