Question # 1

The speed of randomly moving electrons depends upon

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pressure

volume

temperature

mass

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

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Smaller

Lerger

Same

Much larger

None of these

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

Number of supplementary units are

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Three

Two

Seven

Five

A body of mass 1.0 kg is falling with an acceleration of 10 m/s². Its apparent weight will be (g=10 m/s²)

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1.0 kg wt

2.0 kg wt

0.5 kg wt

Zero

Such an inductor coil which does not consume energy and is often employed for controlling a.c. without consumption of energy is called

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Choke

impedance

Semi-conductor

None

The dimensions of work

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[MLT^-1]

[MLT^-2]

[ML²T^-2]

[MLT]

The neighbours of every molecule in crystalline solids are arranged in

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an irregular manner

a regular manner

any manner

none of them

If the external driving force is periodic with a period compareable to the natural period of the oscillator, then we get

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diffraction

beat

interference

resonance

In a cubic crystal, All solids meet at:

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60^o

90^o

109^o

30^o

10^o

When the total displacement is divided by total time taken, we get:

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Velocity

Average speed

Average velocity

None of these

Direction of angular momentum is determined by:

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Right hand rule

Head to tail rule

Left hand rule

None of them

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

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Negative

Positive

Infinite

Zero

Tick the one which is not polymer solid:

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Zirconia

Polythene

Nylon

Synthetic rubber

None of these

In a semi-conductor material, the total current is

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only the +ve current

only the electronic current

sum of +ve and electronic current

all of them

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

Which instrument is expensive and difficult to use?

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Voltmeter

Potentiometer

CRO

Both A and C

Both A and B

There are some whose resistivity becomes zero below a certain temperature, called

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absolute zero

0°C

critical temperature

lower fixed point

Branch of physics which deals with the study of stars and galaxies is called:

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Solid state physics

Astrophysics

Molecular physics

Chemical physics

The characteristic of a body executing S.H.M is that its acceleration is

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inversely proportional to displacement

directly proportional to displacement

independent of displacement

equal to zero

Slope of velocity time graph represents:

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Acceleration

Speed

Torque

Work

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

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classical mechanics

Newtonian mechanics

quantum mechanics

statistical mechanics

The damping depends upon the

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amplitude

sharpness

both of them

none of them

If a body reaches a speed equal to the speed of light, then its mass will became

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zero

very small

infinity

none of these

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

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180 watt

10 watt

20 watt

60 watt

For a given angle of projection, if the time of flight of a projectile is doubled, the horizontal range will increases to

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Four times

Thrice

Once

Twice

Density of fluid is defined as:

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Its volume to mass ratio

Product of volume and mass

Its mass of volume ratio

None of these

The transitions of electrons in the hydrogen atom result in the emission of spectral lies in the:

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Ultra red region

Visible region

Ultraviolet region

Any of these

None of these

The change of magnetic flux through a circuit will produce

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Magnetic Field

Electric Field

emf

a.c

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

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