Question # 1

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

Force is a:

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Scalar quantity

Base quantity

Derived quantity

None of these

Glycerin has viscosity _____ the viscosity of water:

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More than

Equal to

Less than

None of these

The band above the valence band is called

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high energy band

conduction band

empty band

none of them

The input resistance of the OP-AMP is the resistance between the

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(-) input and output

(+) input and output

(-) and (+) inputs

between any inputs

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic feild

Constant electric field

None of these

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

For a moving body, at any instant of time

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If the body is not moving the acceleration is necessarily zero

If the body is slowing, the retardation is negative

If the body is slowing, the distance is negative

If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

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0°C

10°C

17°C

20°C

If the length of the conductor is double and its cross sectional area is halved, its conductance will

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Increase four fold

Become one-fourth

Become one-half

Remains unchanged

In the compton's effect, it is found that the wavelength of incident x-rays is

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greater than the wavelength of scattered x-rays

equal to the wavelength of scattered x-rays

less than the wavelength of scattered x-rays

any one of these

At any point on the right bisector of the line joining two equal and opposite charges

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At electric field is zero

The electric potential is zero

The electric potential decreases with increasing distance from the centre

The electric field is perpendicular to the line joining the charges

The bob of a simple pendulum is suspended by

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string

heavy inextensible string

light extensible string

light inextensible string

Nuclei that have the same charge number but different mass number are called

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isotones

isomers

isotopes

isobars

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

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Equal to 1

Less than 1

Greater than 1

Infinity

If the acceleration of a body is negative, then slope of the velocity-time graph will be:

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Zero

Positive

Negative

Infinity

de-Broglies hypthesis was experimentally verified by

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Maxwell

Compton

Einstein

Davison and Germer

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

Pressure may be define as _______ per second per unit area:

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Change in force

Change in momentum

Change in energy

Work done

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

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Non-uniform density

uniform density

high density

low density

Fraction of the decaying atoms per unit time is called

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decay atom

decay element

decay constant

decay

The magnitude of the force producing an acceleration of 10 m/sec2 in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

When a conductoris moved across a magnetic field:

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Emf induced its similar to that of a battery

Emf induced gives rise to induced current

An emf is induced across its ends

All are correct

None of these

The motion of a body in a straight line is the motion in

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one dimension

two dimension

three dimension

four dimension

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

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-y direction

+y direction

+z direction

-z direction

None of these

The basic circuit element in D.C. circuit is:

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A capacitor

A resistor

An inductor

Both (A) and (C)

Both (A) and (B)

The time required for a radioactive material to decrease in active by one half is called

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half time

half life

disintegration time

mean life

An inkjet printer uses in its operation:

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Neutrons only

Mesons only

Positrons and photons

An electric charge

None of these

A digital system deals with quantities which has discrete values:

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Two in number

One in number

Three in number

Four in number

None of these

The example/s of non-electrical energy to electrical is/are:

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Chemical energy

Mechanical energy

Heat energy

Both (A) and (B)

All of these

For transmission of both transverse and longitudinal waves, we can use:

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Solid

Gas

Plasma

None of these

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