Question # 1

On loading the prong of a tuning fork with wax, the frequency of sound.

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Increases

Decreases

Remains same

First increases then decrease

Pressure 'P' of a gas is defined as

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F/A

FA

F/V

F/D

Speed of sound in aluminum at 20 ^oC is.

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3600 m/s

5100 m/s

5130 m/s

3500 m/s

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

the example of mechanical waves is

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Water waves

Infrared waves

Radio waves

Ultraviolet waves

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Unit vector

+ve of a vector

Resultant vector

-ve of a vector

Which material has maximum viscosity

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Glycerin

Plasma

Methanol

Water

The law of conservation of mass gives us

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Equation of continuity

Stock's law

Bernoulli's equation

Viscosity

With increase of temperature, speed of sound.

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Remains constant

Becomes zero

Decreases

Increases

One complete round trip of a vibrating body is called.

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Frequency

Time period

Vibration

Amplitude

The horizontal component of velocity of projectile

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Increases

Decreases

Remain same

Decreases and then increases

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The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

Before the launch of a rocket the mass of fuel of the rocket is approximately consists of.

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60%

50%

80%

100%

When ever the path difference between the waves is integral multiple of half the wavelength, interference will be

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Constructive

Destructive

(-)ve

(+) ve

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

Energy dissipated usually appears as

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P.E.

Heat Energy

Chemical energy

Nuclear Energy

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