Question # 1

The bad conductor of heat is:

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Iron

Copper

Air

Aluminum

Such state of matter which has no specific shape is called:

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Solid

Liquid, Gas

Gas

Solid and plasma

The density of a substance can be found with the help of

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Pascal's law

Hooke's law

Archimedes principle

Principle of floatation

In houses, good thermal insulation means _____________ consumption of fuel:

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Lower

Higher

Normal

None

Length of a rod is L∘ on temperature T∘. After heating upto temperature T, its length L becomes

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L = L∘ (1 + αΔT)

L = L∘ (1 + ΔT)

L = L∘ (1 - αΔT)

L = L∘ (1 -ΔT)

Why a coin stacked over remain undisturbed on pulling the paper strips quickly?

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Due to charge

Due to motion

Due to inertia

Due to material

Glass and transparent polythene sheets allow radiations of wavelength to pass through them:

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Long

Short

Medium

All

Heat capacity of 5 kg water is.

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2000 JK^-1

2100 JK^-1

21000 JK^-1

210000 JK^-1

Work is done when force displace inits own _____________

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Way

Method

Direction

None

When a horse pulls a cart , the action is on the :

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Cart

Earth

Man

Earth & cart

The unit of strain is:

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Nm^-2

Pa

Newton

None

_______________ was a pupil of Galileo.

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Einstein

Robert

Al Razi

Torricelli

The temperature at which a solid start melting is:

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Freezing point

Melting point

Fusion point

Both B and C

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