Question # 1

A steel of which material should be placed between the plates of a parallel plate capacitor in order to increase its capacitance.

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tin

Iron

Copper

Mica

Plasma exists in

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Electric bulbs

Tube light

Energy savers

Fluorescent tubes

Which Isotopes is use din radioactive dating.

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C¹²

C¹³

C¹⁴

C¹⁶

Andrews isothermal helps to messure

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Boiling point

Boyle's temperature

Temperature of inversion

Critical temperature

The scientist who first noted that a compass needle was deflected when in the neighborhood of a current carrying wire was.

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Joseph Henry

Hans Christian Oersted

Michael Faraday

J.J. Thomson

Which temperature is required for the fusion of two nuclides.

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10⁶ K

10⁷K

10⁸K

10 ⁹ K

Davision and Germer got Nobel prize for their work on

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The dual nature of particles

The wave nature of particles

The corpuscular nature of particles

All of the above

What is the degree of magnetization of a material.

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Susceptibility

Ablitity

Retentivity

Capacity

The velocity of sound will be greater in.

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Air

Water

Solids

Vacuum

The phase velocity is the velocity of a point that moves with a wave at constant phase it is also called.

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Phase speed

Wave speed

Wave velocity

All of these

An electrical device is rated at 12 W , 2 A How many 1.5 V batteries are needed in the device.

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2

4

6

8

Which one of the following is not a dimensionless quantity.

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Radian

pi

Decibel

Force

Convention is the transfer of thermal energy by means of currents in

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Pressure

Temperature

Liquids

Fluids

For which material magnetic susceptibility is negative.

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Paramagnetic

Diamagnetic

Ferromagnetic

All of these

Which of the following is used for reducing spherical aberrations in optical instruments.

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Plano convex lens

Concave lens

Spherical mirrors

Piane mirrors

What is a measure of the separation of positive and negative electrical charges in a system of charges.

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charge polarization

Electric dipole moment

Electric field

Electrostatic induction

Drag force between two layers under consideration depends on

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Distance between the layers

Surface area of layers

Relevant velocity between them

All of the above

A man of mass 100 kg is standing in an elevator. The net force acting on the man reads its weight when the elevator is going up with acceleration 4 m s-2 would be.

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100 N

590 N

490 N

980 N

The reciprocal of decay constant lamda of a radioactive element is.

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Half life

Mean life

Total life

Curie

The maximum K.E. with which photoelectrons are emitted depends very strongly on the.

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Intensity of incident light

Electric field near the photocathode

Frequency of incident light

Polarization of incident light

Which property of waves is independent of the others.

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Amplitude

Velocity

Frequency

Wavelength

A water wave is an example of.

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Transverse wave

Longitudinal wave

Hair wave

Shock wave

Mostly widely used types of gas LASER are.

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Neon

Argon ion

Helium

All of these

Who wrote books on sound and music.

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Galileo

Alkundi

Alberuni

Ibn al Haithem

The design of an airfoil uses

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Archimedes principle

Bernouli's principle

Pascal law

Hooke's law

Lenses of what diameter are usually not practical.

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Less than 1 m

Larger than 1m

Larger than 5 m

Larger than 10 m

Which of the following are defects in human eye.

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Myopia

Hypermetropia

Presbyopia

All of these

The potential difference between two points is equal to the difference of

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Kinetic energy

potential energy

Electric current

Charge energy

A convention current is the movement of fluid caused by the change in.

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Pressure

Temperature

Densities

Volume

Clouds are white because they efficiently scatter sunlight of all

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Colours

Wavelengths

Frequencies

Phases

Which of the following is standard scale of temperature

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Mercury scale

Platinum resistance scale

Gas scale

Alcohol scale

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