Question # 1

The gravitational force between two bodies does not depends upon.

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The product of their masses

Their separation

The sum of their masses

The constant of gravitation

Which of the following is the most commonly used regions of operations for a transistor.

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Cut off

Saturation

Active

All of these

When Photon incident on a metal produce the emission of electrons the process is called.

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Photo electric effect

Pair production

x-rays production

Gama ray production

Sub atomic particles which experience strong nuclear force are.

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Leptons

Hadrons

Mesons

Quarks

The two elements with same number of electrons but different mass number are called.

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Isotones

Isobars

Isotopes

Isomers

The pressure necessary to liquify a gas at the critical temperature is called.

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Normal pressure

Atmospheric pressure

Critical pressure

Liquid pressure

At what speed the mass of a body will be doubled.

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0.67 C

0.77 C

0.87 C

0.97 C

Faraday's law deals with

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Induced emf

Motional emf

Induced current

Electric current

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

The unit of energy are the same as that of

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Force

Power

Work

Efficiency

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

The loss of mass in a.m.u in a nuclear change can be calculated from energy involved in MeV by

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Dividing by 931

Multiplying by 931

Diving by 391

Multiplying by 391

Express the quantity 225 x 10^-6 s using prefixes.

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0.225 micro second

2.25 micro second

225 micro second

2,25 neno second

The continuous X rays spectrum is due to an effect.

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Bremsstrahlung

Breaking radiation

Holography

both a and b

Rate of flow of a liquid is expressed in

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Litre m-3

Litre s-1

Litre m-1

Litre s

Mean free path in a gas is the

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Distance travelled by a molecule before hitting a wall

Average distance travelled by a molecule in one second

Average distance travelled between molecules between any two successive collisions

Root mean square velocity

What are isotopes.

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Atoms of the same element with different numbers of neutrons.

Atoms of the same element with different numbers of protons.

Atoms which are radioactive

Atoms which have gained or lost an electron

The SI unit of current gain is.

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Ampere

Ampere metre

Ampere volt

It has no unit

Which one of the following is diamagnetic

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Liquid oxygen

Air

Water

Copper sulphate

The angular frequency time period and frequency in SHM not depend upon.

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Mass

Force constant

Amplitude

Restoring force

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

The back ground radiation in the atmosphere on the average is

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0.5 Sv per year

1.0 Sv per year

1.5 Sv per year

2.0 Sv per year

Which of the following radiations can penetrate 20 cm thick steel.

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Alpha particles

Beta particles

Gama particles

Neutrons

What is the quantitative description of the effect of radiation on the living tissue.

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Radiation dosimetry

Radioactive dating

Telemetry

Dosage

The amount of heat developed in a resistor is directly proportional to.

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The square of the current only

The resistance of the conductor only

The time of current passing only

The square of current resistance and teh time of current flow

The first measurement of the force between electric charges was made in.

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1684

1784

1864

1874

Electromagnetic wave theory was proposed by

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Maxwell

Hertz

Fizeace

Huygen

The sound waves used sonography are

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Less than 20 KHz

of 20 Khz

Greater than 20 KHz

Of 20 MHz

The constant lamda is called the.

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Decay constant

Gas constant

Planck's constant

Dose constant

Hydrogen bomb is based on

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Controlled chain reaction

Uncontrolled chain reaction

Nuclear fusion

Nuclear fission

Oscillatory motion is always under

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An applied force

Restoring force and inertia

A periodic force

A gravitational force

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