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Physics XI Notes

Physics XI Notes

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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 Glycerine more viscous than water?

Why is Glycerine more viscous than water?

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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
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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Reflection at curved mirrors- Old is Gold

Reflection at curved mirrors- Old is Gold

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Thermal Properties of Matter- Old is Gold

Thermal Properties of Matter- Old is Gold

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

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

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Surface Tension-Old is Gold

Surface Tension-Old is Gold

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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
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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Viscosity-Old is Gold

Viscosity-Old is Gold

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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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Why is the kinetic friction less than the limiting friction?

Why is the kinetic friction less than the limiting friction?

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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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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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Capacitance and dielectrics- Old is Gold

Capacitance and dielectrics- Old is Gold

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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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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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Lenses – Old is Gold

Lenses – Old is Gold

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Photometry- Old is Gold

Photometry- Old is Gold

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What are centre of buoyancy and metacentre?

What are centre of buoyancy and metacentre?

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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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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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Physics XI Questions

Physics XI Questions

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10 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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What are the drawbacks of simple pendulum?

What are the drawbacks of simple pendulum?

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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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Explain why the moon has no atmosphere?

Explain why the moon has no atmosphere?

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A cork is floating in water. What is the apparent weight of the cork?

A cork is floating in water. What is the apparent weight of the cork?

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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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Explain which one is more elastic- rubber or steel.

Explain which one is more elastic- rubber or steel.

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Is friction a necessary evil? Explain.

Is friction a necessary evil? Explain.

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What do you understand by viscosity?

What do you understand by viscosity?

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Distinguish between conservative and non-conservative force.

Distinguish between conservative and non-conservative force.

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Optical instruments- Old is Gold

Optical instruments- Old is Gold

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Hygrometry- Old is Gold

Hygrometry- Old is Gold

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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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Refraction at plane surfaces- Old is Gold

Refraction at plane surfaces- Old is Gold

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

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

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Why is a horse more stable than a man?

Why is a horse more stable than a man?

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Units in different systems

Units in different systems

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3 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
What is meant by elastic and inelastic collision?

What is meant by elastic and inelastic collision?

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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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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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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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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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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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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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First law of thermodynamics- Old is Gold

First law of thermodynamics- Old is Gold

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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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Kinematics-Old is Gold

Kinematics-Old is Gold

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Second Law of Thermodynamics- Old is Gold

Second Law of Thermodynamics- Old is Gold

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Why is it difficult to run fast on sand?

Why is it difficult to run fast on sand?

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Transfer of heat- Old is Gold

Transfer of heat- Old is Gold

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1. State Newton’s Second Law of Motion.

1. State Newton’s Second Law of Motion.

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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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What is meant by the moment of a couple?

What is meant by the moment of a couple?

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