Question # 1

Which of the following is most suitable as the core of transformer

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Soft iron

Alinco

Steel

None of these

1 gm-cm^-3is equal to:

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10³kg-m^-3

10^-3kg-m^-3

1 kg-m^-3

10⁶kg-m^-1

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

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100 ev

10⁶e v

10³e v

1.0 e v

A particle moving uniformly along circle its projection along diameter performs

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Linear motion

Projectile motion

SHM

Rotatory motion

A body moving with uniform velocity has

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positive acceleration

negative acceleration

infinite acceleration

zero acceleration

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is:

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0.5 J

2 J

0.25 J

1 J

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

The ideal gas law is

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P = nRT

V = nRT

PV =RT

PV =nRT

Root out of the conventional source of energy:

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Energy from biomass

Hydroelectric energy

Geothermal energy

None of these

Referring to above figure, due to change in current in the coil P, the change in magnetic flux

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Is associated with coil P

Is associated with coil S

Causes and induced current in coil S

All of these

None of these

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

If the particle is moving in a circle of radius 'r' with uniform angular velocity ω. The angle between r and tangential velocity is

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0^o

90^o

180^o

270^o

The ratio of forces between two tiny bodies with constant charges in air and in an insulating medium of dielectric constant k is

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1 : K

K : 1

1 : K²

K² : 1

When V₁ is approximately zero then Bernoulli's equation reduces to

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Torricelli's theorem

Venturi relation

Equation of continuity

None of these

Bulk modulus for mercury is

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27

29

29.4

30

Newton's rings are formed as a result of

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diffraction of light

dispersion of light

interference of light

polarization of light

Sunset makes sky appears reddish because of:

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Diffraction of sun rays

Refraction of light

Scattering of light from dust particles

Polarization of ligth

Bernoulli s equation is the fundamental equation in fluid dynamics that relates pressure to

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Height of fluid column

Fluid speed

Both of these

None of these

For obtaining equal and same height mirror should be

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Convex

Concave

Plane

None

Generally thermometers make use of the fact that most of the liquids

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Compress on heating

Expand on heating

Evaporate on heating

Sublime on heating

You are on a frictionless horizontal plane.How can you get off if no horizontal force is exerted by pushing against the surface?

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By jumping

By spitting or sneezing

By rolling your body on the surface

By running on the plane

A particle of mass 'm' at rest is acted upon by a force 'P' for a time 't' its kinetic energy after an interval 't' is

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P²t²/m

P²t²/2m

P²t²/3m

Pt/2m

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