Question # 1

Which of the following is not a projectile

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a bullet fired from a gun

a space ship

a football in air

an artillery shell

The waves which propagate through the oscillations of material particles are known as:

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Mechanical waves

Electromagnetic waves

Any of them

None of them

If time period of a pendulum is doubled by increasing its length, then its frequency will

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Also be doubled

Become half

Become one fourth

Becomes four times

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

Alfa , beta and gamma rays are emitted from a radio-active substance

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spontaneously

when it is heated

when it is exposed to light

When it interacts with the other particle

Method "lamp and scale arrangement" used to measure the

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angle of deflection

restoring torque

magnetic field strength

current

For multiplication and division purposes, percentage uncertainties are:

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Add

subtracted

Multiplied

Divided

The number of vibrating body at any instant from its equilibrium position is called

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displacement

frequency

amplitude

time period

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

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-y direction

+y direction

+z direction

-z direction

None of these

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

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Greater than 300

Smaller than 300

Equal to 300

Any of (A) or (B)

Any of (A) or(C)

A spring of constant k = 0.4 N m^-1_{is to be extended thorugh 10 cm at a place where g = 10 m sec}^-2. The mass to be suspended should be:

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4 gms

0.4 gms

40 gms

None of these

The time taken by the light to travel from Sun to Earth is

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4 min 20 sec

5 min 20 sec

8 min 20 sec

9 min 20 sec

The viscous force on a small sphere moving in fluid at high speed v is proportional to

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v²

v

1/v

1/v²

Viscus force between two layers depends on

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Relative velocity of the layers

Distance between layers

Surface area of layers

All of these

When the torque acting on a system is zero, which of the following will be constant

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linear momentum

angular momentum

impulse

force

At what point/points in its path does a projectile have its maximum speed ?

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At the point of projection

At the point where its strikes the ground

Both

None of these

The blending of light when it passes from one medium to another is known as:

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Refraction

Interfarance

Polarization

Both (B) and (C)

Two lenses of power +12 and -2 diopters are placed in contact the power of combination is

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10 diopters

8 diopters

6 diopters

12 diopters

The wave nature of light was proposed by:

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Newton

Thomas Young

Huygen

None of these

1 revolution is equal to

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2π radian

360^o

Both

None of these

When sunlight falls on a soap bubble (film), it appears coloured because of

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interference of light

dispersion of light

polarization of light

diffraction of light

For the conversion of heat into work, the two bodies are essential as temperature which is

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Similar

Very little difference

Large difference

None of these

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