Question # 1

A semiconductor diode conducts only when it is

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Not biased

Zero biased

Reverse biased

Forward and biased

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

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Pressure

Temperature

Densities

Volume

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

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Thoriated tungsten

Tungsten

Copper

Cesium

Which experiment is a demonstration that matter and energy can display properties of both waves and particles.

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young's double slit experiment

Division germier experiment

Heisenberg's uncertainty experiment

Stern Gerlach experiment

Newton proposed his corpuscular theory on the basis on

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Newton's rings

Polarization

Dispersion of white light

Rectilinear property of light

Density of blood a

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Equal to water

Greater than water

Less than water

zero

The eight most common element in the universe by mass is

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Ge

C

Si

As

Thermodynamics deals with

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Isolated systems

The interactions among various parts of the system

The microscopic behavior of a system

The interactions between system and surrounding

Which one of the following temperature scales is independent of the properties of any particular substance.

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Kelvin scale

Gas scale

Thermodynamic scale

Celsius scale

The Compton effect in X-rays proves that

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Electrons have wave property

x-rays have wave properly

X-rays have particle characteristics

Electrons cannot exist

A number of spherical capacitors of different radii have same potentials The surface charge density on them

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I equal

Is proportional to their radii

Is inversely proportional to their radii

Is inversely proportional to square of their radii

When a liquid is hated retaining its liquid sate then its molecules gain.

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K.E.

P.E

Heat energy

Chemical energy

In a half wave rectifier the rms value of the A.C. component of the wave is.

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Less than D.C. value

Great her than D.C. value

Equal to D.C. value

Zero

The characteristic of an image formed by a plane mirror is.

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It is of the same size as the object

It is laterally inverted

It is upright

All of the above

Which of the following is a transverse wave.

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Sound wave

Shock wave

Hair wave

Radiowave

Which material has the larges resistivity.

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Silver

Germinium

Amber

Sulphur

In CC configuration voltage gain is.

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Less than one

More than one

One

Zero

Thermodynamics concern its primary with the

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Measurement of quantity of heat

Physical effects of temperature changes

Conversion of heat into other energy forms

Behavior of gases

If an object moves with velocity of light the apparent mass of the object as compared to list original mass is

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greater

Smaller

Same

zero

the consumption of energy by a 60 watt bulb in 2 s is

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0.02 J

30 J

120 J

60 J

How the small bulbs used for decoration purposes are connected.

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In parallel

In series

In mixed order

In vertical position

The force experienced by a unit positive charge at that point placed in an magnetic field is known as.

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Electric field intensity

Electric flux

Electric potential

Electric dipole

Since a diode permits the flow of current only in one direction so it can be used as.

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An oscillator

A rectifier

A phot deflector

A transistor

When a projectile reaches the highest point the vertical component of velocity becoems.

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Small

Vi cos thetha

Zero

Maximum

The current passing through the switch s will be

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Zero

3 A

4.5 A

10 A

who gave the law of equipartition.

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Maxwell

Carnot

Claussius

Boltzmann

In the magnetic circuit concept the quantity analogous to electric current in electric circuit analysis is.

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Magnetic flux density

Permeability

Magnetic field intensity

Magnetic flux

A negative magnification always means the the image is.

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Erect

Real

Virtual

Inverted

Mean free path of gas molecules is inversely proportional to its.

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Volume

Pressure

Temperature

Weight

What is an elementary particle, the basic unit of light and all other form of electromagnetic radiation.

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Phonon

Photon

Neutron

Proton

A single silicon photovoltaic cell produces a voltage of the order of.

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0.3 V

0.6 V

0.9 V

1.2 V

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