Question # 1

The whole structure obtained by the repetition of unit cells is called:

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Crystal lattice

Amorphous solid

Polymeric solid

Polysterne

None of these

Pressure exerted by a gas is

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Independent of density of the gas

Inversely proportional to the density of the gas

Directly proportional to the square of the density of the gas

Directly proportional to the density of the gas

The range of wavelengths of colurs in the visible colours is

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140 nm to 456 nm

10 nm to 56 nm

410 nm to 656 nm

910 nm to 956 nm

None of these

A vector which has magnitude 'one' is called:

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Resultant vector

A unit vector

Position vector

None of these

The curve representing an adiabatic process is called

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isotherm

adiabat

adiable

none of them

The efficiency of petrol engine is usually not more than 25% to 30% because of

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friction

heat losses

both of them

none of them

Which of the following options states the names of fluids in the order of increasing viscosity?

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mercury, motor oil, methanol

methanol, mercury, motor oil

motor oil, mercury, methanol

methanol, motor oil, mercury

At 'resonance' the transfer of energy from deriving source to the oscillator is

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maximum

minimum

zero

none of them

The reciprocal of decay constant λ of a radioactive material is:

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Frequency

Half life

Year

Mean life

None of these

Glycerin has viscosity _____ the viscosity of water:

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More than

Equal to

Less than

None of these

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

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1890

1895

1900

1905

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

Neutron was discovered in

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1915

1920

1925

1932

Arsenic, antimony and phosphorus are the elements from

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third group

fourth group

fifth group

none of them

The displacement of body executing SHM is

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x_ocoswt

x_osinwt

x_osin²wt

Both A, B

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

Which of the following is most suitable as the core of transformer

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Soft iron

Alinco

Steel

None of these

The capacitance of a parallel plate capacitor depends upon

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Area of the plates

Separation between the plates

Medium between the plates

All of the above

Two bodies of masses 1 kg and 5 kg are dropped gently form the top of a tower. A a point 20 cm from the ground both the bodies will have the same

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Momentum

Kinetic energy

Velocity

Total energy

Gaussian surface is always:

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Rectangular

Spherical

Cylinder

Box shape

Any of these

Watt x second is unit of:

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Force

Work

Power

None of these

In frequency modulation (FM), the carrier waves amplitude

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Remains constant

Increase

Decreases

None of these

Where the streamlines are very far apart from each other, the pressure will be

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low

zero

high

all of them

Work has the dimensions as that of

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Torque

Angular momentum

Linear momentum

Power

A mass spectrograph sort out

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molecules

atoms

elements

isotopes

if the field is directed along the normal to the area, then flux is:

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Maximum

Equal to zero

Equal to BA

Minimum

Both (A) and (C)

To convert galvanometer into ammeter we connect

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small resistance in parallel with galvanometer

small resistance in series with galvanometer

high resistance in series with galvanometer

high resistance in parallel with galvanometer

Circular motion is an example of motion in:

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One dimension

Two dimensions

Three dimensions

None of these

The SI unit of flux density is

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Newton/Amp-meter

Newton-m/Ampere

Newton-m/Amp²

Newton-Amp/meter

The average of A.C. current and voltage over a complete cycle is

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Maximum

zero

Neither zero nor maximum

None of these

Change in momentum is one second called.

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Impulse

Force

Energy

Work

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