Question # 1

When temperature increase, the frequency of a tuning fork

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Increases

Decreases

Remains same

Increase or decreases depending on the material

Shock absorber of the car is an example of

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resonance

forced oscillations

interference

damped oscillations

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

The galvanometer can be made sensitive if the value of the factor C/BAN is

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constant

small

large

none of these

Which of the following is not an example of adiabatic process

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the rapid escape of air from a burst type

the rapid expansion and compression of air through which a sound wave is passing

cloud formation in the atmosphere

none of them

Rate of change of momentum is called

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Impulse

Force

Torque

Momentum

The waves which propagate by the collision of material particles are known as

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e.m. waves

mechanical waves

light waves

microwaves

The electric field, magnetic field and the direction of their propagation are mutually

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perpendicular

parallel

none of these

Velocity of sound in a diatomic as is 300 m/sec. what is its rms velocity?

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400 m/sec

40 m/sec

430 m/sec

300 m/sec

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

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5 cm

10 cm

15 cm

20 cm

A process which can be retraced in exactly reverse order, without producing any change in the surroundings is called

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reversible process

irreversible process

any one of them

none of them

Range of projectile is maximum when thrown at an angel of

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30°

60°

45°

75°

Ideal fluid is

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Steady flow

Non-viscous

Incompressible

All of these

The force which maintains the strict long-range order between atoms of a crystalline solid is the:

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Nuclear force

Cohesive force

Adhesive force

Coulomb force

None of these

The relation for impulse can be written as

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F x t = mV_i- mV_f

F x t = mV

F x t = mV_f- mV_i

None of these

Identify the correct unit of pressure among t bese

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kgms^-1

kgm^-1s^-2

kgm²s^-2

kgm^-2s^-1

When the terminal velocity is reached the acceleration of body moving through a viscous medium is

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Zero

Positive

Negative

Depends upon other factors

In deriving Bernoulli s equation we assume that the fluid is

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Incompressible

Non-viscous

In steady flow

All of these

A body in equilibrium implies that it is no moving nor rotating

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True

False

Sometimes in equilibrium

None of these

If A x B = B x A,then the angle between A and B is

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π

π/3

π/2

π/4

The displacement coincides with the path of the motion when a body moves in a

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curved line

straight line

either straight or curved

none of them

The fine rulings on a compact disc as a diffraction grating but each line is wide like

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0.01 μm

0.5 μm

0.05 μm

0.6 μm

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