Question # 1

The isotope/s of hydrogen is /are:

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Protium

Deuterium

Tritium

Both (A) and (B)

All of these

Least distance of distinct vision of an old man possibly becomes:

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A little less than 25 cm

A little more than 25 cm

Much less than 25 cm

None of these

When a falling body hits ground, its KE changes to _____ energy.

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Potential

Chemical

Mechanical

sound and heat

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

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increases

decreases with time

remains constant

none of them

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

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

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heat capacity

specific heat capacity

molar specific heat

molar specific heat at constant volume

magnetic field is a:

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Vector quantity

Scalar quantity

Scalar as well as scalar quantity

Any of (A) or (B)

Neither (A) nor (B)

The life time of metastable state is equal to

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Life time of excited state

Greater than by excited state

Zero

Less than by excited state

The branch of physics which is mainly concerned with the motion of bodies under the action of forces is called:

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Optics

Mechanics

Thermodynamics

Astro physics

The whole structure obtained by the repetition of unit cells is called:

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Crystal lattice

Amorphous solid

Polymeric solid

Polysterne

None of these

Which of these is not a radiation detector

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Wilson cloud chamber

cyclotron acceleration

Geiger Miller counter

solid state detector

The consumption of energy by a 60 watt bulb in 2 sec is

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60 J

120 J

30 J

0.2 J

The magnitude of work is

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W = Fd cos θ

W = Fd

W = dF cos θ

All of these

Which of the following is an optically active material

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Solution of cane sugar

Liquid nitrogen

Mercury

Polaroid

In the theory of dimensional analysis, heat may be properly represented by:

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ML²T^-2

MT^-2

ML^-1T^-1

None of these

If the vibrations of the light wave are confined to one plane only, then this light is called

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unpolarized ligth

polarized light

sunlight

none of them

The relative permitivity ∈_r for transformer oil is

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2.9

3.0

2.1

2.4

If the vector sum of all the external forces acting on a body is zero, then the body will be in

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rotational equilibrium

translational

complete equilibrium

all of them

Surface area is

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Scalar

Vector

Neither scalar nor vector

Both scalar and vector

When the pressure of a fixed mass of a gas is decreased under isothermal condition there is

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Fall of temperature

Increase of density

No change in internal energy

A decrease in the value of PV

If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting calculate the focal length of objective

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100 cm

10 cm

20 cm

25 cm

The phenomenon of radioactivity is associated with:

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Fission of nucleus

Disintegration of neutrons

Emission of spectral lines

Spontaneous disintegration of the nuclei of atoms

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