Question # 1

The work done in moving a body between two points in a conservative field is independent of the

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Direction

Force applied

Path followed by the body

Power

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

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A - Z

A + Z

Z

A

If the flow is incompressible and the flow is steady then the mass of the fluid through the pipe

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increases

decreases

becomes zero

is conserved

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

The example of reversible process is

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an explosion

changes occur suddenly

slow compression of a gas

all of them

The focal length of convex lens having magnifying power of 5.55 is:

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5.5 cm

5 cm

4.5 cm

6 cm

The definite number of significant figures in 5000 is:

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Four

Three

Two

One

The rate of change of momentum of a molecule is equal to:

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Pressure

Work

Density

Force

The nature of radiations emitted by a hot body depends upon its:

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Metarial

Temperature

colour

Volume

Length

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

The range of wavelengths of colurs in the visible colours is

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140 nm to 456 nm

10 nm to 56 nm

410 nm to 656 nm

910 nm to 956 nm

None of these

The number of isotopes of hydrogen are

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2

1

3

4

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic field

Constant electric field

None of these

Converse of pair production is known as

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Compton effect

annihilation of matter

photoelectric effect

none of these

Change in momentum is one second called.

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Impulse

Force

Energy

Work

The phase angle of a series RLC circuit at resonance is

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180°

90°

0°

None of the these

Work done along a closed path in a gravitational field is:

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Maximum

Minimum

Zero

Unity

The example of irreversible process is

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slowly liquification

slowly evaporation

an explosion

all of them

The substance in which atoms are so oriented that the field produced by spin and orbital motion of the electrons might add up to zero,are called

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diamagnetic substances

ferromagnetic substances

paramagnetic substances

all of them

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

Centripetal acceleration is also called _______ acceleration:

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Tangential

Radial

Angular

None of them

While describing the motion of a simple pendulum, the frictional effects are

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taken into account

completely ignored

partially ignored

none of them

The electric flux from a closed surface

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Is independent of the shape of the surface

Depends on the charge enclosed by the surface

Both a and b

None of the above

The magnitude of the displacement is a line from initial position to final position which is

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straight

curved

either be curved or straight

none of them

The statement "the electric force of repulsion or attraction between two point charges is directly proportional to the product of the charges and inversely proportional to square of the distance between them" refer to

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Coulomb's law

Gauss's law

Biot-Sarwat law

Ampere's law

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

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0.5 Kwn

2 Kwh

1 Kwh

None of these

Majority charge carriers in the p-region of p-n junction are:

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electrons

positrons

Holes

Neutrons

None of these

The combined effect of resistance and reactance in a.c. circuit is called

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conductance

resistance

impedance

choke

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

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Diffraction

Interference

Polarization

Dispersion

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

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Ideal gas

Inert gas

Real gas

None of these

CT scanning is the abbreviated name of

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