Question # 1

The highest efficiency of a heat engine whose low temperature is 17 oC and the high temperature of 200 oC is.

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20%

30%

35%

40%

The magnitude of the resultant of two equal forces is equal to either to the force What is the angle between the two forces

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0 ^o

120 ^o

60 ^o

180 ^o

Neutrino9 is a particle with

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Charge less property and has no spin

Charge less property and has spin

Charge less like electron and has spin

The same property as neutron

Which of the following is dimensionless.

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Strain

Stress

Pressure

Volume

If the base emitter junction is forward biased and base collector junction is reverse biased the BJT is in.

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cut of mode

Amplification mode

Saturation mode

Inversion mode

Electrostatic force as compared to gravitational force is

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Zero

infinite

Very weak

Very strong

If the wave length of a wire is 1 cm and its period is 0.02 s, the velocity of the wave will be

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20 cm s-1

50 cm s-1

60 cm s-1

100 cm s-1

How eddy current losses are reduced in A F and R F transformers.

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By using air cores

By using shell cores

By using laminated cores

By using ferrite cores

If two gases have same reduced pressure volume and temperature it is according to

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Boyle's law

Charles law

Law of corresponding state

Zeroth law

The coulomb's law is valid for the charges which are.

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Moving and point charges

Moving and non point charges

Stationary and point charges

Stationary and large size charges

If the gas pressure is increased then its mean free path becomes.

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Zero

Infinite

Less

MT-2 is the dimensionless formula of.

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Moment of iniertia

Viscosity

surface tension

Angular acceleration

The Lenz's law is also a statement of the law of conservation of.

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Energy

Mass

Momentum

Torque

The internal inertia of a thermodynamics system is known as.

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Enthalpy

Entropy

Isotherm

Adiabatic

A body is termed as perfectly elastic if.

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It can move freely

Its surface is perfectly somooth

It is not affected by an external force

It recovers the original shape when the deforming force is remover

A mercury thermometer has

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Low conductivity and low thermal capacity

High conductivity and high thermal capacity

Low conductivity and high thermal capacity

High conductivity and high thermal capacity

Artificial polymers are made by a chemical reaction known as.

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Crystallization

Electroplating

Polymerization

Polarization

The energy delivered to the tissue per unit mass is called the absorbed dose of.

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X rays

gama rays

Radiation

energy

The nucleus of tritium is called.

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Proton

Triton

Deuleron

Positron

What is the properly of materials that responds at an atomic or subatomic level to an applied magnetic field.

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Magnetism

electroplating

Diamagnetism

Electrolysis

Which factor remains constant in a transformer.

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Current

Voltage

Power

Frequency

X-rays are absorbed maximum by

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Paper

Copper

Steel

Lead

Who suggested that energy is radiated or absorbed in discrete packers called quanta.

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Max. Planck

Stefan

Lummer

Boltzmann

Which of the following in the best container for gas during adiabatic process.

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Copper vessel

Thermos flask

Glass container

Wooden container

A heat engine can develop efficiency equal to 100% if the temperature of the sink is

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Less than that of source

Equal to that of source

0 K

0 ^oC

Which of the following circuits is used as local oscillator in radio receivers.

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AF oscillator

Phase Local Loop

RF oscillator

All of the above

The binding energy to pull the deuterium H apart into a proton and a neutron is equal to.

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1.22 MeV

2.22 MeV

3.22 Mev

4.22 MeV

In the absence of air resistance all objects regardless their weights, fall with

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Same velocity

Different velocity

Same acceleration

Different acceleration

Who invented the first closed tube thermometer in 1713

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Gabried Fahrenheit

Galileo

anders Celsius

Lord Kelvin

Which of the following parameters is irrelevant for a fuse wire.

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Its radius

Current flowing through it.

Its specific resistance

Its length

Which one of the following is a convenient energy unit to express the energy of sub atomic particles.

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Joule

electron volt

Watt

Curie

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