Question # 1

If velocity time graph is parallel to time axis, then acceleration of moving body will be.

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Maximum

Positive

Zero

Negative

The portion of the wave above mean level is called.

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Node

Antinode

Crest

Trough

The SI units of flow rate are.

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m2s-1

m3s-2

m3s-1

m2s-2

A typical diffraction grating has certain number of lines per centimeter whose range is.

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40 to 50

400 to 5000

400 to 500

4000 to 5000

The ability of reveal the minor details of an object under examination is called.

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Resolving power

Magnification

Scattering

Reflection

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

Which quantity of the following is dimensionless.

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Angular velocity

Centripetal force

Angular acceleration

Angular displacement

The shortest distance between two points is called

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Distance

Amplitude

Displacement

Is a number

Height of geo stationary orbit of the satellite above the earth is.

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300 km

250 km

400 km

None of these

Bio mass is converted into fuel by

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Evaporation

Fermentation

Reflection

Scattering

An elevator is moving up with an acceleration equal to 'g' An apparent weight of the body in an elevator is.

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Zero

Equal to real weight

2 mg

3 mg

Total change in momentum of an isolated system is

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Always (+) ve

Always (-) ve

Has maximum value

Zero

Reapters are placed in new system at distance of.

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30 km

50 km

80 km

100 km

In vibrating string, the points where the amplitude is maximum are called.

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Nodes

Antinodes

Troughs

Crests

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

The kinetic energy of molecules of an ideal gas at absolute zero is

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Very low

Very high

Zero

First increases then decreases

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

The speed of sound in ari at 0 ^oC is 332 ms-1, Then the speed at 40 ^oC will be

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372 ms-1

356 ms-1

346 ms-1

332 ms-1

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