Question # 1

In the absence of air resistance the acceleration of a body will be

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Uniform

Variable

Instantaneous

None of these

A gas performs 10 J of work while expanding adiabatically. the change in its internal energy is.

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10 J

-10 J

100 J

-200 J

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

The value of a time period of allow flying satellite is

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1 year

84 minutes

28 hours

1 day

The resultant of two forces 3N and 4 N acting at right angle to each other is.

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5 N

6 N

1 N

7 N

The apparent change in the pitch of sound due to relative motion is called.

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Carnot theorem

Interference

Doppler effect

Beats

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

A constant temperature, if pressure of a given mass of gas is halved, then its volume becomes.

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Halve

Doubled

Four time

Constant

Sound travel faster in

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CO2

H2

O2

He

In reversible process the entropy of system.

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Remain constant

Decrease

Increase

Becomes zero

In blue light is used as compare to red light then fringe spacing.

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Increase

Decreases

Remain same

Becomes zero

The actual efficiency of property turned petrol engine is.

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20% to 30%

30% to 35%

40% to 45%

25% to 30%

The behaviour of gases is discussed by

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Knowing their nature

Knowing their temperature

Kinetic theory

Maxwell's theory

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

the quantities which are define din term of other physical quantieis are called

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Base Quantities

Derived quantities

Bothe a and b

None of these

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

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