Question # 1

In order to get interference using two light rays

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The sources should be monochromatic and coherent

The sources should have the same frequency

Superposition should be linear

All of these

The smooth or steady stream-line flow is know as

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Laminar flow

Turbulent flow

Both a and b

None of the above

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

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F=e(V x B)

F= -e(V x B)

F= e(B x V)

Both a and c

An eV is unit of:

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Potential

Energy

Work

Power

Both (B) and(C)

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

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ON switch

off switch

function switch

none of these

In case of an ideal gas, the P.E associated with its molecule is

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maximum

zero

minimum

not fixed

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

A prism splits a beam of white light into seven component colors. This is so because

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Phase of different colors is different

Amplitude of different colors is different

Wavelength of different colors is different

Velocity of different colors is different

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

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1.7 x 10³J

10.2 x 10³J

3..4 x 10³J

6.8 x 10³J

Diameter of the atom is of the order of

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10^-10m

10^-12m

10^-15m

10^-9m

The law of conservation of energy gives us

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equation of continuity

Bernoulli's theorem

both of them

none of them

The typical speed of reconnaissance jet (SR-71) is

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900 ms^-1

950 ms^-1

980 ms^-1

990 ms^-1

Shear modulus for lead is

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1.7

4.9

5.6

6.2

A car is moving high velocity when it takes a turn.A force acts on it outwardly because of

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Centripetal force

Centrifugal force

Gravitational force

All of these

Change in momentum per second is:

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Product force and time

Product of pressure and area

Ratio of pressure and area

None of these

If the line of action of force F passed through the axis of rotation or origin then its torque is

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Maximum

Minimum

Zero

None of these

Arsenic antimony or phosphorus are impurities of

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p-type

n-type

May be p-type or n-type

None of these

Total number of base units are

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three

five

seven

nine

The index of refraction of diamond is 2.0 velocity of light in diamond in m/s is

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6 x 10⁸

3 x 10⁸

2 x 10⁸

1.5 x 10⁸

Which of the following properties show light is transverse wave in nature?

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Interference

Reflection

Diffraction

Polarization

The ratio of size of the image to the size of the object is called

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Resolving power

Magnification

Power

None of these

The transmission of information by light waves may be

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An audio signal

A television signal

A computer data signals

All of them

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