Question # 1

Latent heat of fusion is denoted by:

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H1

Hm

Hv

Hf

If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be

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Maximum

Minimum

Zero

None of these

When a body is lifted through a height h, the work donw on it appears in the form of its.

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Kinetic energy

Potential energy

Elastic energy

Geothermal energy

In building central heating system works on the process of:

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Covection

Radiation

Conduction

both a and b

The energy possessed by a body due to height is called:

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P.E

K.E

Both

None

In Einstein's mass-energy equation c means speed of light. Its value is:

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3 x 10^-8 ms^-1

3 x 10⁸ms^-1

3 x 10⁹ms^-1

3 x 10¹⁸ms^-1

Action and Reaction are always on:

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Same body

Different bodies

Any body

None of these

To every action there is always an equal but __________ reaction:

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Same

Parallel

Opposite

Equal

Prefix naming as Giga has a symbol.

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M

G

m

g

The study of the structure and properties of atom is called.

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Electricity

Nuclear physics

Geo Physics

Atomic Physics

The product of force and momentum arm is called:

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Couple arm

Torque

Rigid body

Axis of rotation

Radioactive isotopes present in atmosphere is

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Cobalt -60

Ph-32

Carbon -14

Carbon -20

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

Which component is output device of computer:

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CPU

C.D

Keyboard

Monitor

A device which has two ways communication is:

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Television

Radio

Hard disk

Mobile phone

A device which has two ways of communication is:

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television

radio

hard disk

mobile phone

The lines will be in the form of concentric circles, if conductor is:

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Circular

Straight

Solenoid

None of these

The S.I unit of intensity of sound is:

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Wm

Wm2

Wm-2

Wm-1

The standard group of bits in digital electronic is:

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5 bits

6 bits

7 bits

8 bits

Which of the following devices can be used to produce both a transverse and longitudinal waves?

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A string

A ripple tank

A helical spring

A tuning fork

A unit of electric charge, equal to the charge of 6.25x10¹⁸ electrons is:

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Electricity

Coulomb

Electric potential

Volt

Information storage devices work on the principles of

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Heat

Sound

Light

Magnetism

One radian is equal to.

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75.3^o

57.3^o

35.7^o

73.3^o

The dimension of viscosity are

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[M2L-2T2]

[M-1LT-1]

[M-1L-1T]

[ML-1T-1]

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

The space within which gravitational force acts on a body is called

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Electric field

Gravitational field

Magnetic field

Force field

When newton ring are seen through the transmitted light, then central spot is.

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Dark

Blue

Bright

Red

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

The speed of sound is greater in solids due to their high.

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Density

Pressure

Temperature

Elasticity

A 60 kg man in an elevator is moving upward with an acceleration of 9.8 ms-2. The apparent weight of the man.

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Increase

Decreases

Remain constant

Becomes zero

The temperature of human body on Kelvin scale is

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210K

310K

410K

510K

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

Kirchhoff's voltage rule is a way of stating conservation of.

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Mass

Charge

Energy

Momentum

Xc =

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1/2πfc

2πfc

2π/fc

fc/2π

The converses of annihilation of matter is:

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Photoelectric effect

Relativistic effect

Pair production

Compton effect

When a motor is over loaded then the magnitude of back emf.

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Increases

Decreases

Remain constant

Zero

The SI unit of relative permittivity is.

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Fm-1

C2N-1m-2

Nm2C-2

No unit

The brightness of the spot of CRO screen is controlled by.

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Anode

Cathode

Grid

Deflecting plates

An electron miroscope emplys which to one of the following particles?

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Electron ahve a wave nature

Electrons can be focused by an electric field

Electrons can be focused by a magnetic field

All of the above

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

Commentator was invented by

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Henry

Ousted

Maxwell

William sturgeon

Platinum wire becomes yellow at a temperature of.

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900^oC

1300^oC

1600^oC

500^oC

Which is not characteristic of Laser.

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Monochromatic

Coherent

Intense

Multi direction