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Physics

Physics
The weight of a body acts through the centre of

Mass
Buoyancy
Gravity
Both (A) and (B)

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Physics
The threshold frequency is the frequency below which :

Photo current increases with voltage
Photo electric emission is not possible
Photo current is constant
Photo current decreases with voltage

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Physics
Which has the lowest albedo?

Both A & B
Light surfaces
Dark surfaces
None of these

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Physics
A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum:

When it is just on the half-way
Just after it is dropped
When it touches the ground
Just before it touches the ground

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Physics
Which of the following laws validates the statement that matter can neither be created nor destroyed ?

Law of conservation of mass
Law of osmosis
Law of conservation of energy
Le Chatelier's Principle

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Physics
Which of the following is the second largest source of global energy?

None of these
Renewable Energy
Fossil fuel
Nuclear Energy

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