Question # 1

A gas thermometer is more sensitive than a mercury thermometer because the expansion of gas for 1 o/c rise in temperature is.

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Five times as much as mercury

Ten times as much as mercury

Twenty times as much as mercury

Hundred times as much as mercury

According to Max. Planck, energy is released or absorbed in discrete packets called.

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quanta

Meson

Energy shells

Position

Choose the one which acts as single inverter.

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Common emitter

common collector

Common base

Diode

In potential for the material of cathode pure metals are rarely used because of their

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Low reflecting power

High reflecting power

Low resolving power

High resolving power

The resistance of a capacitor when it is connected with a battery is.

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Zero

Finite

Infinite

The same

Which of the following is the cause of failure of a lens to form a sharp and district image of a white object.

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Spherical aberration

Chromatic aberration

Distortion

Astigmatism

A direct vision spectroscope is better than a prism spectrometer because it helps in

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Observing the spectrum without a source

Observing the spectrum perpendicular to a source

Observing the spectrum in line with the source

all of the above

The magnetic induction is also called the

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Magnetic intensity

Magnetic flux

Magnetic flux density

Magnetic magnetization

Which of the following material could be used for a high vacuum, high voltage tube.

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Thoriated tungsten

Tungsten

Copper

Cesium

A force applied at centre of mass of a body

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Does not produce any torque

Produces torque

Produces acceleration

Produce couple

The half life of a radioactive substance as compared to its mean lif eis.

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30%

50%

70%

90%

To final image produced by a compound microscope is.

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Real and inverted

Real and erect

Virtual and erect

Virtual and inverted

A gallium atom is.

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Monvalent

Diavalent

Trivalent

Pentavalent

The phenomenon of polarization is done by

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Selective absorption

Scattering of light

Refraction of light

Dispersion of light

The continuous X rays spectrum is due to an effect.

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Bremsstrahlung

Breaking radiation

Holography

both a and b

Which one of the following quantities is conserved in a nuclear reactor.

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Energy only

Mass only

Momentum only

Mass energy and momentum

In a series resonant circuit, the current at resonance is.

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Maximum

Minimum

Zero

Sometimes maximum and sometimes minimum

What is zoom lens

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It is a lens having fixed focal length

It is a lens having variable focal length

It is a lens used in radii to telescope

All of the above

The law of equation of energy is applicable to the system whose constituents are.

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At rest

In orderly motion

in random motion

Moving at constant speed

A stretched wire with clamped ends has a fundamental frequency of 1,000 Hz. What will be the new fundamental frequency if tension in the wire is increased by 2%

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980 Hz

1,000 Hz

1,010 Hz

1,020 Hz

In rectifiers silicon junction diodes are preferred to germanium type because.

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They are cheaper

They are durable

Their much lower reverse current makes them more efficient

Of their geometry

Certain gas are called permanent gases because.

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They cannot be liquified

They are perfect gases

The critical temperatures are low

their boiling points are low

The addition of two or more waves is termed as

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Interferences

Period

Echo

Polarization

If positive terminal of the battery is connected to n-type and negative terminal of the battery is connected to p-type then the diode is.

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Saturated

A gate

Forward biased

Revere biased

When a force of 4 N acts on a body of mass 2 kg for a time of 2 s, the rate of change of momentum is.

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2 kg ms -1

4 kg ms-1

8 kg m s-1

16 kg m s-1

Object may acquire an excess or deficiency of charge by

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Rubbing them together

Grounding them

Applying coulomb's principle

Shielding them

Bernouli's equation includes as a special case of.

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Hook's law

Torricelli's therorem

Third law of motion

Archimedes principle

A sonometer or audiometer is a device based on the principle of.

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Resonance

Beats

Overtones

Harmonics

In compound microscope image formed by the eyepiece is

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Real

Inverted

erect

diminished

The Pressure will be low where the speed of the fluid is

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Zero

High

Low

Constant

When a sound source moves towards a stationary observer there is.

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An apparent increase in wavelength

An apparent increase in frequency

an apparent decreases in frequency

A change in the velocity of the sound

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