Question # 1

CT scanning is the abbreviated name of

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Computed Technology

Computed Technique

Computed Technology

Computerized Technique

The projectile motion is composed of

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horizontal motion only

vertical motion only

horizontal and vertical motion

none of them

Electromagnetic waves transmit energy equal to

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1/2 mv²

m_oc²

hf/c

hf

Conversion of alternating current into direct current is called

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amplification

rectification

conduction

polarization

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

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a rocket

an aeroplane

a projectile

a ballon

Aerodynamics is a branch of

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Hydrodynamics

Thermodynamics

Both of them

Statics

According to Einstein, with the great increase in the speed of the body, the relativistic mass of the body

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Remains constant

Decreases

Increases to infinity

Reduced to zero

Blomass includes:

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Crop residue

Natural vegetation

Animal dung

All of these

If the formula PV = nRT, n denotes:

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Number of molecules per unit volume

Number of moles

Number of molecules

None of these

Choose the set of physical quantities, which have both numerical and directional properties:

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Velocity, mass

Speed, acceleration

acceleration weight

Distance, force

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

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11/3 A

3 A

3/11 A

6

Monochromatic light means waves of:

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Same frequency

Same colour

Same wavelength

All of them

de-Broglies hypthesis was experimentally verified by

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Maxwell

Compton

Einstein

Davison and Germer

The space around the earth in which its gravitational force acts on a body is called

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Electric Field

Gravitational field

Magnetic field

Conservative field

The SI unit of capacitance is

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Farad

Henry

Ohm

Volt

The current of 1 ampere is passing through a conductor. The charge passing through it in half a minute is:

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One coulomb

0.5 coulomb

30 coulomb

2 coulombs

None of these

A projectile on its path gets divided into two pieces at its highest point. Which is true?

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Momentum increases

Momentum decreases

Kinetic energy increases

Kinetic energy decreases

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

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1916

1919

1921

1923

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

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200 J

100 J

1000 J

400 J

The free electrons in metals:

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Are in random motion and their speed depends upon temperature

Move in particular direction

Move with speed of light

Move such that their speed does not depend on their temperature

None of these

High speed meteors rushing through air reduces to ashes because of:

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Force of gravity

High resistance of air

Drag force

None of these

Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

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Interference

Diffraction

Polarization

Refraction

Pressure of a gas at constant volume is proportion to

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Total energy of gas

Average P.E to molecules

Average K.E of molecules

Total internal energy of gas

When the temperature of source and sink of a heat engine become equal entropy change will be

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Zero

Max

Min

-ve

Escape velocity from surface of Moon as compared to that from Earth surface is:

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Greater

Smaller

Equal

None of thes

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

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modification

voltage

current

resistance

The rain drop falling from the sky reach the ground with

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Constant terminal velocity

Constant gravitational acceleration

Variable acceleration

acceleration greater than g

If a liquid is heated in weightlessness, the heat is transmitted through

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Conduction

Convection

Radiation

Neither, because the liquid cannot be heated in weightlessness

Which one of the following has larger value of relative permitivity E_rat room temperature?

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Vaccum

Air

Glass

Water

In a three phase a.c. generator, there are

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2 coils

3 coils

1 coild

No coil

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

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Decreases

Increases

Remains same

Zero

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