Question # 1

Specific heat of water is J kg^-1 K^-1IS:

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4200

4000

1000

2500

The value of g at a height one Earth's radius above the surface of the earth is:

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2g

1/2 g

1/3 g

1/4 g

The quantities that describe completely by magnitude and direction are.

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Scalar

Vector

Base

Derived

If a liquid of mass 'm' requires thermal energy 'ΔQv' to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vapourization can be calculated as following:

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Hv = m/ΔQv

Hv = mΔQv

Hv = cmΔQv

Hv =ΔQv/m

It is easy to turn a steering wheel by applying a:

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Torque

Force

Couple

Momentum

The kinetic energy of the body of mass 1000 kg moving a speed of 20 ms^-1 will be:

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2 x 10² J

2 x 10³J

2 x 10⁵J

2 x 10⁸J

At sea level , Atmosphere pressure is:

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101,300 Pa

101,400 Pa

101,500 Pa

101, 600 Pa

An interval of 200 micro second equivalent to.

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0.2 s

0.02 s

2 x 10^-4 s

2 x 10^-6 s

__________ is a major source of heat:

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Mercury

Sun

Fire

Moon

The study of internal structur eof Earth is called.

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Atomic Physics

Plasma Physics

Geo physics

Nuclear Physics

SI unit of pressure is pascal, which is equal to

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104 Nm-2

1 Nm-2

102 Nm-2

103 Nm-2

How many tubes or electron guns used in a colour television set:

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Two

Four

Five

Three

The device which is used to convert sound waves into electrical signal is called:

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Ear piece

Microphone

Transmission channel

Receiver

The index of refraction depends on:

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The focal length

The speed of light

the image distance

The object distance

Which is the most suitable means of reliable continuous communication between an orbiting satellite and earth:

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Mecrowaves

Radio waves

Sound waves

Any light waves

If the distance between the charged bodies is much greater as compared to their sizes then the bodies are considered is:

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Positive charge

Negative charge

Point charge

Zero charge

When the object is placed beyond 2F of a convex lens, the image formed will be:

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Real, inverted and smaller than the object

Real, inverted and of the same size as the object

Real, inverted and larger in size than the object

Virtual, erect and larger in size than the object

For observing how fast plants are absorbing phosphate fertilizer we use.

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I.131

Ph -32

Co-60

Ar-40

the insulator between the plates of capacitor is called:

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dielectric

capacitance

resistivity

permittivity

A normal eye can see near objects clearly at a distance of:

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20 cm

25 cm

30 cm

35 cm

One coulomb is equal to charge of electrons:

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6.25x10^-19

6.25x10¹⁹

6.25x10¹⁸

6.25x10^-18

The A.C. used in our houses has frequency _____ cycle/sec

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60

30

50

130

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

Time period of simple pendulum only depends on

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Mass

Amplitude

Density

Length

When a body is moving along a circular path, then such a motion is called

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Vibratory motion

Rotatory motion

Linear motion

None of these

The efficiency of diesel engine is about

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25% to 30%

35% to 40%

40% to 50%

50% to 60%

Temperature of a gas is increased from 27 oC to 127 oC. The ratio of its mean K.E. will be

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3/4

9/16

4/3

10/9

the shortest distance between two points is called.

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Speed

Acceleration

Distance

Displacement

At constant temperature and pressure, if volume of given mass of a gas is doubled then density is.

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Doubled

1/4 original

1/2 of original

Unchanged

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

If an object is placed with in the focal length of a convex lens, its image is formed.

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Real

Inverted

Virtual

Smaller than object

The types of optical fibres are

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Three

Four

Five

Six

The to and fro motion of a body is called

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Linear motion

Rotational motion

Vibratory motion

None of these

How many neutrons are there in the nuclide Zn⁶⁶?

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22

30

36

66

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

The first superconductor was discovered in:

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1831

1911

1921

1876

The typical nuclei are less than:

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10^-16m

10^-14m

10^-12m

10^-10m

Concept of electric field lines was given by:

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Michelson

Henry

Michael faraday

Oersted

Lenz's law deals with

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Magnitude of emf

Direction emf

Direction of induced current

Resistance

The circuit in which current and voltage are in phase, the power factor is:

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Zero

1

-1

2

The electric intensity due to two oppositely charged plates is

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None of these

Helium-Neon laser discharge tube contains neon

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82%

15%

25%

85%