Question # 1

When the amplitude of a wave become double, its energy becomes

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One half

Two times

Three times

Four times

Work is a

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Scalar quantity

Vector quantity

Basic quantity

None of these

The speed of sound in air would become double than ots speed at 10^oC at a temperature of.

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313 ^oC

586 ^oC

859^oC

899 ^oC

SI unit of work

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Newton

Walt

Pascal

Joule

Experimentation and practical verification was fist indroduced by

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The Muslim Scientists

The Greek philosopher

The European scientsts

None of these

A body covers a distance of 10 m in 1 sec with a constant velocity of 10 ms-1 , Acceleration produced by the body is.

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0 ms-1

2 ms-2

5 ms-2

10 ms-2

The difference between tow molar capacities is equal to.

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Plank's constant

General gas equation

Molar gas constant

Boltzmann constant

Angular velocity determines, How fast or, How slow a body is

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Accelerating

Vibrating

Rotating

Oscillating

Which of the following is not directed along the fixed axis of rotation.

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Angular displacement

Angular momentum

Centripetal acceleration

Angular acceleration

The units of magnifying power of microscope or telescope are.

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Metre

m^-1

dioptre

No unit

According to Newton, sound travels in air under conditions of.

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Adiabatic

Isothermal

Isobaric

Isochoric

Size of the molecules is much smaller as compared to the

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Mass of the molecules

Distance between the molecules

Density of the molecules

Volume of the molecules

The device used to study the spectra from different sources of light is

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Telescope

Optical fibre

Spectrometer

Microscope

Carnot cycle consists of.

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Two steps

Three steps

Four steps

Five steps

The efficiency of a Carnot Heat Engine is 100% if temperature of sink T2 is.

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0 ^oC

0 K

0 ^oF

100 K

The wave form of SHM is.

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Sine wave

Cosine wave

Tangent wave

Square wave

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

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

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7 N

5 N

4 N

1 N

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