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Physics XI Notes

Physics XI Notes

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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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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
Dispersion- Old is Gold

Dispersion- Old is Gold

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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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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
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
Second Law of Thermodynamics- Old is Gold

Second Law of Thermodynamics- Old is Gold

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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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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 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
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 does K.E. of an object change if its momentum is doubled?

How does K.E. of an object change if its momentum is doubled?

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

Why is a horse more stable than a man?

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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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1 min read
Why does ice float in water?

Why does ice float in water?

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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
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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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
Explain why the moon has no atmosphere?

Explain why the moon has no atmosphere?

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Optical instruments- Old is Gold

Optical instruments- Old is Gold

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Distinguish between conservative and non-conservative force.

Distinguish between conservative and non-conservative force.

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Hygrometry- Old is Gold

Hygrometry- 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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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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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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Explain why a cyclist bend while going along curved road?

Explain why a cyclist bend while going along curved road?

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Photometry- Old is Gold

Photometry- Old is Gold

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Lenses – Old is Gold

Lenses – 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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1 min read
First law of thermodynamics- Old is Gold

First law of thermodynamics- Old is Gold

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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
Reflection at curved mirrors- Old is Gold

Reflection at curved mirrors- Old is Gold

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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
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 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
Work

Work

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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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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
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
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 which one is more elastic- rubber or steel.

Explain which one is more elastic- rubber or steel.

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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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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
Surface Tension-Old is Gold

Surface Tension-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
What do you understand by viscosity?

What do you understand by viscosity?

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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
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 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
State the laws of flotation.

State the laws of flotation.

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Explain why a man carrying a load on his back leans forward?

Explain why a man carrying a load on his back leans forward?

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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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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
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 a cow more stable than a man?

Why is a cow more stable than a man?

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Refraction through prisms- Old is Gold

Refraction through prisms- Old is Gold

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Heat and Temperature- Old is Gold

Heat and Temperature- Old is Gold

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1 min read
Physics XI Questions

Physics XI Questions

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10 min read
Electrostatics- Old is Gold

Electrostatics- Old is Gold

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1 min read
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