Question # 1

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

The units of magnifying power of microscope or telescope are.

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Metre

m^-1

dioptre

No unit

In order to produce beats, the two sound waves should have.

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The same amplitude

Slightly different amplitude

The same frequency

slightly different frequencies.

Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes.

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Double

Half

Four times

Remains same

Second pendulum has a time period

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1 sec

3 sec

2 sec

4 sec

Time period of geostationary satellite of radius 'R' is

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1 hour

48 min

1 day

1 month

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

This is used for

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Co-efficient of friction

Co-efficient of expansion

Co-efficient of viscosity

Co-efficient of contraction

The direction of vector in space is specified by

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1- angle

2- angle

3- angle

4 - angle

The profile of periodic waves generated by a source executing S.H.M is represented by a.

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Circle

Sine curve

Tangent curve

Cosine curve

If a body revolves under centripetal force its angular acceleration is

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Non zero

Variable

Increasing

Zero

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

If the stream lines of fluid are forced closer together then.

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Speed of the fluid increases

Speed of the fluid decreases

Pressure of the fluid increases

Speed of the fluid remain same

The types of optical fibres are

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Three

Four

Five

Six

In simple harmonic motion the velocity of a particle is maximum at.

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Extreme position

Mean position

In between extreme and mean position

None of them

For angular momentum of system to remain constant, external torque should be.

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Small

Large

Zero

None

A double convex lens acts as diverging lens when the object is

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At infinity

Inside the focus

A way from focus

A a large distance from lens

For a gas obeying Boyle's Law, if the pressure is doubled, the volume becomes.

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Double

Three fold

One half

Remains the same

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