Question # 1

When a charged particle passes through matter, it produces ionization, this effect is used in

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fission reaction

reactor

radiation detector

fusion reaction

The branch of physics which concerned with the ultimate particles of which the universe is composed is known as

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SolidState physics

Particle Physics

Nuclear Physics

Atomic Physics

Bernoulli's equation is applicable for

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turbulent flow

streamline flow

both (a) and (b)

all kinds of flows

We can excite an atom by

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Bombardment of particles

Radiating photons

Providing potential difference

All answer are true

The waveform of alternating voltage is a:

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Square

Rectangular

Saw-tooth

Sinusoidal

None of these

Which waves are used in sonography?

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Microwaves

Infra red waved

Sound waves

Ultrasonic waves

The entity which measures the quantity of motion in a body is called

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force

energy

momentum

power

Which of the following forces is responsible for SHM

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Applied force

Restoring force

Fractional force

Elastic force

When quarter of a cycle is completed, the phase of vibration is:

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90°

180°

45°

360°

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 typical rocket ejects the burnt gases at speeds over

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400 ms^-1

40000m s^-1

40000 ms^-1

60000 ms^-1

When first condition of equilibrium is satisfied the body has

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no linear acceleration

no angular acceleration

rational equilibrium

none of them

A rain drop of radius r falls from a certain height h above the ground. The work done by the gravitational force is proportional to

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r

r²

r³

r⁴

The measure of the deformation of a solid is called

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Stress

Strain

Elastic constants

None of these

In petrol engine, the second stroke is the

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Compression

In take

Power

None of these

If the distance between the plates of a parallel plate condenser of capacity 10 μF is doubled then new capacity will be

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5μF

20 μF

10μF

15 μF

In super conductors, once the current is established it exists

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1 day

30 days

indefinitely

None of these

With the propagation of longitudinal waves through a material medium, the quantitiestransferred in the direction of propagation are:

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Energy, momentum and mass

Energy and momentum

Energy and mass

Energy

A wire is stretched by applying a stretching force.If the stretching force is doubled within elastic limit Then energy stored in the wire will

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Be double

Increase by four times

Increase by eight time

Remain same

In place of spark plug, the diesel engine requires also

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High speed air

High temperature air

Low temperature air

None of these

One light year is equal to

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9.5 x 10¹⁵m

9.5 x 10¹⁵sec

9.5 x 10¹⁵km

9.5 x 10¹⁵cm

If a lens is cut into two piece perpendicular to the principal axis and only part is used the intensity of the image:

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Remains same

1/2 times

2 times

Infinite

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