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Physics XI Notes

Physics XI Notes

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Why are roads banked on curved path?

Why are roads banked on curved path?

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1 min read
Why does ice float in water?

Why does ice float in water?

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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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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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Lenses – Old is Gold

Lenses – 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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Why is it difficult to run fast on sand?

Why is it difficult to run fast on sand?

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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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Transfer of heat- Old is Gold

Transfer of heat- Old is Gold

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What is meant by elastic and inelastic collision?

What is meant by elastic and inelastic collision?

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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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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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Does a ship sink more in river water or in sea water? Explain.

Does a ship sink more in river water or in sea water? Explain.

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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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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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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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Second Law of Thermodynamics- Old is Gold

Second Law of Thermodynamics- Old is Gold

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Reflection at curved mirrors- Old is Gold

Reflection at curved mirrors- Old is Gold

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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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What are centre of buoyancy and metacentre?

What are centre of buoyancy and metacentre?

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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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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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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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Explain why spokes are fitted in the cycle wheel.

Explain why spokes are fitted in the cycle wheel.

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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. State Newton’s Second Law of Motion.

1. State Newton’s Second Law of Motion.

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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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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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Optical instruments- Old is Gold

Optical instruments- Old is Gold

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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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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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Why bridges are declared unsafe after a long use?

Why bridges are declared unsafe after a long use?

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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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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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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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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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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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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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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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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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Physics XI Questions

Physics XI Questions

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10 min read
Work

Work

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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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State the laws of flotation.

State the laws of flotation.

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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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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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What do you understand by viscosity?

What do you understand by viscosity?

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Explain why the moon has no atmosphere?

Explain why the moon has no atmosphere?

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Refraction at plane surfaces- Old is Gold

Refraction at plane surfaces- Old is Gold

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why do we slip on a rainy day?

why do we slip on a rainy day?

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What are the drawbacks of simple pendulum?

What are the drawbacks of simple pendulum?

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Electrostatics- Old is Gold

Electrostatics- Old is Gold

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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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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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Why is the bottom of a ship made heavy?

Why is the bottom of a ship made heavy?

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Is friction a necessary evil? Explain.

Is friction a necessary evil? Explain.

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Refraction through prisms- Old is Gold

Refraction through prisms- Old is Gold

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Viscosity-Old is Gold

Viscosity-Old is Gold

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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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Distinguish between conservative and non-conservative force.

Distinguish between conservative and non-conservative force.

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