Question # 1

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)

Law of motion was presented by the scientist.

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Einstein

Newton

Galileo

Archimedes

If a liquid of mass 'm' requires thermal energy 'ΔQv' to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vapourization can be calculated as following:

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Hv = m/ΔQv

Hv = mΔQv

Hv = cmΔQv

Hv =ΔQv/m

If Fx and Fy are rectangular components of a vector F, then the magnitude of vector F is:

[LHR-04 1st G]

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Mass of earth is Me is :

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Me = 6× 1024 kg

6× 1024 kg

7× 1024 kg

6× 1024 Mg

During the hot summer day the vlaue of atomospheric pressure is:

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Increase

Decreases

Constant

None of these

The value of sin θ at an angle of 60o is

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0.5

0

0.707

0.866

What is mass of body if W = 580 N ?

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5.8 Kg

0.58 kg

0.058 kg

58 kg

Which of the following is the unit of momentum?

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Nm

kgms^-2

Ns

Ns^-1

P.E is calculated by a formula :

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Mgh

mg

gh

Nil

The least count of vernier callipers is.

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.01 mm

0.1 mm

.001 mm

.01 m

The Celsius lower reference point is 0^oC while upper reference point is:

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212 ^oC

180^oC

100^oC

110^oC

Which gas is used inspite of Freon gas in refrigerator?

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CO₂

H₂

NH₃

N₂

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