Question # 1

The electrons occupying the conduction band are known as

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conduction electrons

free electrons

both of them

none of them

The materials in which there are plenty of free electrons for electrical conduction are known as

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conductors

insulators

semi-conductors

all of them

Glass and high carbon steel are the examples of

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brittle substances

ductile substances

plastic substances

elastic substances

A body moving with an acceleration of 5 m/sec²started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?

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150 m

250 m

350 m

400 m

If the formula PV = nRT, n denotes:

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Number of molecules per unit volume

Number of moles

Number of molecules

None of these

Amount of heat required to raise the temperature of a body through 1 K is called its

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Specific heat

Water equivalent

Thermal capacity

Entropy

The pressure exerted by the gas is

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directly proportional to the P.E

inversely proportional to the P.E

inversely proportional to the K.E

directly proportional to the K.E

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

When a shell explodes in mid-air, its fragments fly off in

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only one direction

in two direction

different directions

a particular direction

The curve representing an adiabatic process is called

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isotherm

adiabat

adiable

none of them

A railway engine (mass 10⁴kg) is moving with a speed of 73 km/h. The force which should be applied to bring it to rest over a distance of 20 m is

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3,600 N

7,200 N

10,000 N

100,000 N

Ultra-violet rays differ from X-rays in that they

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Cannot be diffracted

Cannot be polarized

Have a lower frequency

Are deviated when they pass through a magnetic field

The magnitude of induced emf depends upon the:

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Rate of decrease of magnetic field

Rate of change of magnetic field

Rate of increase of magnetic flux

Constancy of magnetic field

None of these

Rutherford performed an experiment on nuclear reactions in:

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1718 A.D

1818 A.D

1918 A.D

2001 A.D.

1701 A.D.

The impedance of RLC series resonance circuit at resonant frequency is

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Greater than R

Equal to R

Less than R

None of these

The unit of induced emf is:

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Volt

Nm/As

Joule coul^-1

Both A and C

All of these

When heat is removed from the system

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negative

positive

zero

any one of them

The consumption source if energy is:

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Energy from blomass

Hydroelectric energy

Geothermal energy

None of these

Machine parts are jammed due to:

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Increasing in viscosity of lubricant

Decreasing in viscosity of lubricant

Decreasing in surface tension of lubricant

None of these

When two protons are brought closer potential energy of both of them:

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Increases

Decreases

Remains same

None of these

Which of the following is not mechanical wave?

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Sound wave

Light wave

wave produced in spring

None of them

At what temperature the adiabatic change is equivalent to the isothermal change?

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Zero degree Celsius

Zero Kelvin

Critical temperature

Above critical temperature

In the formula for finding the speed of waves in the spring, unit of m in SIn units is:

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kg

kg-meter

kg/meter

Meter/kg

A current carrying conductor sets up its own:

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Electric field

Nuclear field

Magnetic field

Both (A) and (C)

All of these

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

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7.20 N

11.25 N

22.50 N

45.00

G.P. Thomson observer experimentally that electrons and neutrons possess

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particle-like properties

wave-like properties

neither particle nor wave like properties

none of these

The photoelectric effect, the maximum energy of photoelectrons depends on the

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particular metal surface

frequency of incident light

both of them

none of them

Shock absorber of the car is an example of

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resonance

forced oscillations

interference

damped oscillations

One joule is equal to

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1.6 x 10¹⁹eV

6.25 x 10¹⁸eV

1.6 x 18¹⁸eV

6.25 x 10¹⁹eV

When a conductor moved with its length parallel to the lines of magnetic fled:

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An emf is induced across its ends

Emf induced is similar to that of a battery

Emf passes through the conductor

Both A and B

None of these

Unit of viscosity is:

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Kg m^-1sec^-1

N s m^-2

J s m^-3

All of these

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