Question # 1

Pressure of a gas depends upon

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Only on the molecular speed

Only on the speed of molecules on a unit volume

Only on the mass of molecules

Number of molecules mass and speed in a unit volume

Why is a capacitor resistor combination used in oscillators in grid circuit.

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To generate oscillation

To bias the grid automatically

To amplify oscillations

To sustain the oscillations.

A well known example of an intrinsic semi conductors is.

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Germanium

Phosphorus

Cobalt

Aluminium

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

The advantage of electron tube over semiconductor is.

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_{its efficiency}

its unlimited type

Its low consumption power

That it takes no warming up time

Which of the following properties is not exhibited by X-rays.

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Interference

Diffraction

Polarization

Deflection of electric field

Periodic motion is a motion.

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Under the influence of an elastic restoring force

That repeats it self in equal intervals of time

Back and forth over the same path

With constant acceleration

Which of the following is believed to be carrier o nuclear forces.

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Lepton

Meson

Bason

Baryon

a spectrometer is used to study

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Spectrum

Waveform

Interference

Diffraction

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

The relation between horse power and watt is.

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1 hp = 546 watts

1 hp = 746 watts

1 hp = 946 watts

1 hp = 1000 watts

A light beam is said to be plane polarized when

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its vibrations are restricted to only one plane

Its vibrations are very strong in one plane

Its vibrations take place in any plane

Its vibrations are very weak in one plane

A ball is thrown straight up What is its acceleration just before it reaches the highest point.

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Zero

slightly less than g

Exactly g

Slightly greater than g

tuning a radio set is an example of.

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Musical resonance

Electrical resonance

Mechanical resonance

Damping

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

Sunlight can undergo total internal reflection if it enters from

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Glass to air

Air to glass

Air to water

Water to glass

The emission of Beta particle from protonium -218 results in the formation of.

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Protactinium -231

Thorium -232

Astatine -218

Radon -222

The total energy of the hydrogen atom is

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zero

Infinite

positive

Negative

Minor losses through values, fittings, bends etc are modeled as proportional to

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Velocity head

Static head

total head

Pressure drop

The fundamental quantities which form the base of the SI are.

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mass, energy and time

mass, force and time

mass, length and time

mass , length and time

In optics, which subfield studies the measurement of electromagnetic radiation including visible light.

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Radiometry

Photometry

Telemetry

Chronometry

The efficiency of a diesel engine is about

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15% to 35 5

355 to 40%

45% to 655

505 to 65 %

Which type of radiation would be stopped completely by a thin piece of cardboard.

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Alpha particles

Beta particles

Gama rays

X -rays

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

The unit of Rydberg constant R is

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m

m3

m^-1

m-2

What is a thermal properly of a material that determines the quantity of energy required to change the phase of a unit mass of that substance.

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Specific heat

Latent heat

Internal energy

Specific energy

Who provided theoretical explanation of a blackbody spectrum.

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Einstein

Planck

Wien

stefan

A pure choke consumes

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No power

Maximum power

Minimum power

Average power

The dimensions of force are.

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[MLT-2]

[MLT-1]

[M,-1T-2]

[M-2T-2]

In the experiment of production of X rays electrons are accelerated towards the anode by

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Thermionic emission

Potential difference

Breaking potential

Cut of current

Which of the following is a conserfative force.

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Electric force

Frictional force

Normal force

propulsion force of a rocket

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