Question # 1

Huygen's theory cannot explain

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Diffraction

Interference

Polarization

Photoelectric effect

Which of the following forces is responsible for SHM

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Applied force

Restoring force

Fractional force

Elastic force

A rheostat can e used:

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As variable resistor

As potential divider

For varying the current

All of these

None of these

The SI unit of viscosity is

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kg m^-1s^-1

kg ms^-1

kg m^-1s^-2

kg m^-1s

Weber is a unit of

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magnetic flux

magnetic filed intensity

magnetic induction

magnetic flux density

Which of the following quantities remain constant in step up transformer?

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Current

Voltage

Power

Heat

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

In gases, the charge carries are:

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Electrons

Positive ions

Negative ions

Both (A) and (C)

Both (A) and (B)

A dirty carpet is to be cleaned by heating. This is an accordance with____ law of motion:

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First

Second

Third

None of these

The distance covered by a body in unit time is called.

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Displacement

speed

Velocity

Both B and C

The thermistors are usually made of

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Metals with low temperature coefficient of resistivity

Metals with high temperature coefficient of resistivity

Metal oxides with high temperature coefficient of resistivity

Semi conducting materials having low temperature coefficient of resistivity

When the charged particle is projected at right angles to the field, then experienced by it will be:

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Maximum

Zero

qvB

Both (A) and (B)

Both (A) and (C)

Sadi carnot described an ideal heat engine in

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1820

1840

1860

1880

The second law of thermodynamics is concerned with the circumstances in which

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heat can be converted into work

direction of flow of heat

none of them

both of them

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

The measure of the deformation in a solid when stress is applied to its is called

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elastic constant

young's modulus

strain

elasticity

CRO deflects the beam of

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proton

a-particle

electron

neutron

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 Kg

3 Kg

4 Kg

8 Kg

At the starting point of the free fall motion of an object, its acceleration will be

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maximum

minimum

zero

none of them

The induced current in the loop can be increased by:

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All above

Both (A) and (B)

An angle of 180° in circular motion is equivalent to ______ in SHM.

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Half the vibration

One vibration

3/4th of a vibration

None of these

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

Laplace formula is derived from

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Isothermal change

Adiabatic change

Isobaric change

None of these

The number of isotopes of hydrogen are

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2

1

3

4

Deep water almost runs still when surface water flow in rivers. What does it explains

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Magnus effect

Equation of continuity

Surface energy

Bernoulli's equation

Parallel vectors of same magnitudes:

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Are equal

Are unequal

When added give the some equal to zero

Give the answer equal to zero

The net force acting on a 100 kg man standing in an elevator accelerating downward with a = 9.8 m sec^-2comes out to be

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980 N

580 N

1380 N

Zero

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

The wave nature of light was proposed by:

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Newton

Thomas Young

Huygen

None of these

A mass difference of 0.0012 u is equivalent to and energy of:

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0.5 Me V

1.13 MeV

5.13 MeV

1.13 keV

1.13 eV

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