Question # 1

Which of the following characteristics of a wave is independent of the others.

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speed

Frequency

Amplitude

Wavelength

Prince Louis and vector de Brogtle 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

Light year is a unit of

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Light

Velocity

Time

Distance

The ability of eye to focus near as well as distant object is termed as.

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Myopia

Persistence of vision

Power of accommodation

Astigmatism

Solids have

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Fixed shape only

Fixed volume only

Fixed shape and volume

No fixed shape and volume

The practical efficiency of a heat engine is

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25% to 30.5 %

35% to 45%

30% to 45%

15% to 25%

The basic quantity used to describe the state of magnetization of a substance is the

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Magnetic strength

Magnetic susceptibility

Magnetic moment

Magnetic moment per unit volume

Coulomb found that the mutual force between tow electric charges varies.

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Inversely as the distance

Inversely as the square of the distance

directly as the distance

Directly as the distance squared

Who wrote books on sound and music.

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Galileo

Alkundi

Alberuni

Ibn al Haithem

The SI unit of density is.

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kg m2

kg m-2

kg m-3

kg m2 s-2

When X_c = X_l, this condition is called.

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Equality

Balanced

Resonance

Equlibrium

The SI unit of heat capacity is.

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kg J

Kg J-1

J K-1

Kg J-1 K-1

The negative of the potential gradient is

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Potential energy

Electrostatic force

Electric field intensity

Electromotive force

When a hot liquid is mixed with a cold liquid temperature of the mixture.

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First decreases and then becomes constant

First increases and then becomes constant

Continuously decreaes

Is undefined for some time and then nearly becomes constant

Which of the following gives discrete emission spectrum.

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Sun

Candle

Incandescent filament

Mercury vapour lamp

The unit of time constant RC is.

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Second

second-1

Second -2

Second 2

The unit of intensity of sound waves is.

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W m-1

W m-2

N m-1

N m-2

An electric current in conductors is due to the flow of.

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Positive ion

Negative ion

Positive charges

Free electrons

The specific heat of a substance is a function of its

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mass

Weight

Volume

Molecular structure

Which factor remains constant in a transformer.

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Current

Voltage

Power

Frequency

Low frequency response of an amplifier is mainly limited by.

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Biasing configuration

Coupling capacitor

By pass capacitor

Input impedance

A capacitor is connected to a battery The fore of attraction between the plate when the separation between them is halved will

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Remain the same

Become twice

Become 4 times

Become 8 times

Which field is produced by electric charge on a body at rest.

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Electric field only

Magnetic field only

Neither electric nor magnetic field

Both electric and magnetic fields

Which part of D.C motor reverses the direction of current through the coil every half cycle.

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The armature

The commutator

the brushes

The slips rings

The current passing across a p-n junction due to minority charge carriers is called

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Reverse current

Forward current

Leakage current

Both a and b

The convincing evidence of the wave nature of electrons was provide by.

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Stefan

Rayleigh

Davision and Germer

Balmer

The pressure change in a confined incompressible fluid is transmitted equally in all directions throughout the fluid and to the walls of the container This is.

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Archimedes principle

Kirchhoff's law

Pascal's law

Ampere's law

To which law of thermodynamics, the concept of temperature is related to.

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Zeroth law

First law

Second law

Third law

Huygen's principle is used to explain the

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Speed of light

Dispersion of light

Propagation of light

Reflection of light

The path of Gama rays in Wilson cloud chamber is

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Irregular

Dense and straight

Thin and continuous

Thin and discontinuous

The steady current which produces the same heating effect in a resistance in a given time as the alternating current does in the same resistance in the same time is called.

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Induced current

Root mean square value of an alternating current

Mean value of alternating current

Electromotive force

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