Question # 1

The study of physics involves?

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Structure of space and time

Interaction of electromagnetic radiation with matter

Both of them

Chemical changes

None of them

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

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outwards

inwards

in either way

none of these

Polymers are the chemical combination of carbon with:

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Nitrogen

Oxygen

Hydrogen

All of these

None of these

Conversion of alternating current into direct current is called

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amplification

rectification

conduction

polarization

The direction of a vector in space requires:

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X-axis

X and Y-axes

XYZ axes

Y and Z-axes

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

the symbol to be used in relativity problems denotes:

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Dilated time

Proper time

Life time

Half time

None of these

The reverse saturation current in a PN junction diode is only due to

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Majority carriers

Minority Carriers

Acceptor ions

Donor ions

Wave length of light, on the average, is given by:

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10^-14_m

10^-10_m

10^-6_m

10^-4_m

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

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n/AL

Al/n

nAL

nA/L

At higher frequency of the alternating current, the capacitive reactance X_c

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Increases

Decreases

Remains the same

Increases only when the voltage increases

Spectrum represents the number of component colours present in certain light in terms of:

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Wavelength

Frequency

Energy

Both (A) and (B)

All of these

When we consider the average velocity of a body, then the body is moving in

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straight line

curved path

may be in a straight or curved path

none of them

Inverter is the name given to:

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NOT gate

OR gate

NOR gate

AND gate

XOR gate

Light year is a unit of:

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Time

Distance

Velocity

Intensity of light

According to the Max plank, energy is redialed or absorbed in

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discrete packets

continuous waves

either of them

none of these

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

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A - Z

A + Z

Z

A

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

How many number of anodes used in electron gun

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one

two

three

six

Referring to above figure, due to change in current in the coil P, the change in magnetic flux

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Is associated with coil P

Is associated with coil S

Causes and induced current in coil S

All of these

None of these

The intensity at a point due to a charge is inversely proportional to

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Amount of charge

Size of the charge

Distance between charge and the point

Square of the distance from the charge

None of these

Which branch of physics deals with the structure and properties of solids

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Atomic Physics

Plasma Physics

Molecular Physics

Solid state physics

A current of 1.6 A is passed through a solution of CuSO_{4. How many Cu}²⁺ions are liberated in one minute?

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3 x 10²⁰

3 x 10¹⁰

6 x 10²⁰

6 x 10¹⁰

The induced current in a conductor depends upon:

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both A and B

None of these

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

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adiabatically

isothermally

isochorically

isobarically

When a wall is pushed by a person very strongly, he has done:

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Maximum work

Zero work

Positive work

Negative work

The unit of resistivity is

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ohm

ohm-m²

ohm-meter

ohm-m^-1

The restoring force always directed towards the

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extreme position

mean position

both of them

none of them

For a parallel resonant circuit at resonance, current from supply is

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minimum

maximum

zero

none of these

Which one of the following can act approximately as a source of monochromatic light;

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Neon lamp

Fluorescent tube

Sodium lamp

None of these

CRO deflects the beam of

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proton

a-particle

electron

neutron

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