Question # 1

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

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kg

kg-meter

kg/meter

Meter/kg

Charge to mass ratio (e/m) of an electron is given by the relation

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e/m = 2V/Br²

e/m = 2V/B²r

e/m = 2V/B²r²

e/m = V/2B²r²

γ-rays behave like a particle because they explain the

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Compton effect

Photoelectric effect

Pair-production

all the above

The ability of the body to return to its original shape is called

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deformation

stretching

compressing

elasticity

Wave length of that color as compared to that of violet color is:

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Smaller

Longer

Equal

None of these

The chemical properties of an element depends upon the number of

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electron

position

photons

neutrons

The expression of Hook's law is

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F=ma

F=kx

F= -kx

-kx=ma

When platinum wire is heated, then at the temperature of 500 ^oC, it becomes:

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Yellow

Orange red

Dull red

White

Cherry red

The restoring force is always directed towards:

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Rest position

Equilibrium position

Mean position

All of them

Transformer is used to

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Increase alternating current

Increase d.c voltage

Increase & Decrease emf

All answers are right

The direction of lines of force depends upon the direction of

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voltage

current

charges

none of these

When three forces acting at a point are in equilibrium then

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Each force is numerically equal to the sum of the other two

Each force is numerically greater than the sum of the other two

Each force is numerically greater than the difference of the other two

None of the above

Which branch of physics deal with the structure and properties of solids

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Atomic Physics

Plasma Physics

Molecular Physics

Solid state Physics

The blending of light when it passes from one medium to another is known as:

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Refraction

Interfarance

Polarization

Both (B) and (C)

Dimensions of light year are

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[LT^-1]

[ML^-1T]

[ML^-1]

[M⁰L]

A thief stole a box with valuable article of weight W and jumped down a wall of height h.Before he reached ground he experienced a load of

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2W

W

W/2

Zero

The different parts of spectrometer

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Collimator

Turn table

Telescope

All of these

For geosynchronous satellite the orbital time period is

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Greater than earth s spinning time period

Less than earth s spinning time period

Equal to the earth s spinning time period

None of the earth

The high blood pressure is

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100 torr

110 torr

120 torr

130 torr

What is the bulk modulus of a material?

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strain/volumetric strain

volumetric stress/strain

stress/volumetric strain

volumetric stress/volumetric strain

The perpendicular distance between axis of rotation and line of action of force is called

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Moment

Length arm

Moment of length

Moment arm

A 100W, 220V bulb is operated on a 110V line, the power consumed is:

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25W

75W

50W

100W

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