Question # 1

Two bullets a and b have masses 1 kg and 12 kg respectively.

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K.E. of B will be twice that of A

K.E. of A will be twice that of B

Both have same K.E.

K.E. of A will be half that of B

The actual gas can behave like an ideal gas at

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Low density and high pressure

High density and high pressure

Low density and low pressure

High density and low pressure

One Tesla is equal to.

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1 N A-1

1 N m-1

1 N A -1 m

1 N A -1 m-1

When the temperature of a body is equal to that of the surrounding then the body appears

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Dull black

Red hot

In thermal equilibrium

To be cold

For how long the sensation of sound persists in our brain.

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0.1 s

0.2 s

0.3 s

0.4 s

The law of gravitation was introduced by

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Huygen

Boyle

Newton

Pascal

A single silicon photovoltaic cell produces a voltage of the order of.

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0.3 V

0.6 V

0.9 V

1.2 V

Ethanol is a replacement of

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Gasoline oil

Kerosene oil

Refinery oil

vegetable oil

If gravitational field is not uniform over the extended object or system of point masses the centre of mass and centreof gravity will

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Be antiparallel

Not coincide

Coincide

Be perpendicular

Electromagnetic waves are produced by

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Charge at rest

Accelerated changes

Heating a conductor

Electroplating

Who described an ideal heat engine in 1840

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Boyle

Saadi Carnot

Kelvin

Currie

Pure silicon has valence electrons

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1

2

3

4

What will be the frequency it an employ vessel is filled with water.

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Increases

Decreases

Remain unchanged

Fundamental

In a simple D.C. motor the direction of current in the motor is reversed every half revolution to keep the motor turning in the same direction which part of the motor does this.

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Brushes

Coil

Commutator

Poles

What is a measure of the total energy of a thermodynamics system.

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Entropy

Enthalpy

Randomness

Chaos theory

A diode cn be used as

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Amplifier

Rectifier

Oscillator

Transistor

If a fluid does not wet a liquid surface, the angle of contact is.

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90^o

less than 90 ^o

* greater than 180 ^o

between 90^o and 180 ^o

The temperature which is the same in ^oC and ^oF is.

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-20

-40

20

40

A wire of 5 m length carries a steady current if the field inside it is 0.2 v m-1 then the potential difference will be.

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0.1 V

0.5 V

1 V

5 V

Hearing damage is possible at sound pressure of

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0 dB

50 dB

130 dB

195 dB

Who proposed the temperature equalization mechanism of a body by thermal radiations with that of its surroundings.

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Pierre Provost

Robert Brown

Albert Einstein

Issac Newton

A sheet of transparent material with fine equality spaced lines ruled parallel on its surface is called.

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Interferometer

Grating element

ruler

Patch

The static friction is.

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Always equal to dynamic friction

Always less than dynamic friction

Always greater than dynamic friction

Sometimes greater and sometimes less than dynamic friction

Fiber optics system can be used for.

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Word processing

Image processing and receiving

Image transmitting

All of the above

What is the human body temperature in Celsius scale.

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30 oc

36. 9 oC

98. 4 oC

100 oC

Express the quantity 225 x 10^-6 s using prefixes.

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0.225 micro second

2.25 micro second

225 micro second

2,25 neno second

Which one of the following represents an ohm.

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Volt per ampere

Joule per second

Watt per ampere

Joule per coulomb

An operational amplifier have how many input terminals.

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One

Two

Three

Four

Original source of biomass is.

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Stars

Moon

earth

Sun

We get light inside a room in a day time due to

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Interferences

Polarization

Diffraction

Refraction

The angular momentum of a body about a fixed point is conserved if its velocity

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Decreases

Increases

Remain the same

Becomes zero

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