Question # 1

Bimetallic strip works on the principle of

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expansion of metals

contraction of metals

both (A) and (B)

unequal expansion of metals

Gallium (element) melts at:

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40 °C

30 °C

80 °C

90 °C

If force is 200 N and length of spanner is 0.15 then torque will be:

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30 Nm

15Nm

20 Nm

10 Nm

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

Land and Sea breezes are the results of:

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Conduction

Convection

Radiation

Conduction and Radiation

The Young's Modulus of Rubber is:

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1.40 ×106 N/m2

1.6× 106 N/m2

1.4 × 107 N/m2

0.40 × 108 N/m2

Which of the following is the unit of momentum?

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Nm

Kg ms^-2

Ns

Ns^-1

How much force is needed to body of mass 10 kg from falling:

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100 N

150 N

200 N

300 N

The acceleration of a body moving the uniform velocity is.

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Uniform

Zero

Negative

Variable

Which of the substances is the lightest one?

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Copper

Mercury

Aluminium

Lead

If Fx and Fy are rectangular components of vector F, then its direction is determined by the relation

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θ = sin-1 Fv/Fx

θ = tan-1 Fx/Fy

θ = tan Fx/Fy

θ = tan Fy/Fx

According to Archimedes principle the density of a substance is determined by using formula

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D = w1/w2 + w1 x p

D = w1w2/w2- w1 x p

D = w1/w2 - w1 x p

D = w1w2/w2- w1 x p

ΣF=0 is __________ condition of equilibrium:

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1st

2nd

Unstable

Stable

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