Question # 1

Velocity of sound in air at a given temperature.

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Increases with increase in pressure

Decrease with increases in pressure

Is independent of pressure

Becomes quadruples

X-rays can cause

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Malaria

Dysentery

Cancer

Blood pressure

With which factor disputative power of a grating increases.

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Order of spectrum

Number of lines per centimeter

Order and number of lines per centimeter

Shape of the grating

Balimer series lies in the

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Visible region

Invisible region

Infrared region

Far infrared region

The amplitude of a vibrating body at resonance place in vacuum is.

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zero

Maximum

Minimum

Infinite

When a newton's right interference pattern a viewd from above by means of reflected light , the central spot is

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Multicoloured

Alternately white and black

Bright

Dark

Hearing damage is possible at sound pressure of

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0 dB

50 dB

130 dB

195 dB

Light of passing through a polaroid is

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Plane polarized

Unpolarized

Circularly polarized

Elliptically polarized

Newton's rings are formed due to

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Diffraction of light

Interference of light

Polarization of light

Reflection of light

Beats occurs because of.

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Reflection

Refraction

Interference

Doppler's effect

Which are different types of emission spectrum

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Continues spectrum

Line spectrum

Band spectrum

all of the above

The energy transmitted per second though unit are held perpendicular to the direction of propagation of the wave is called.

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Intensity of sound

Pitch of sound

Loudness of sound

Quality of sound

the amplitude of a wave indicates

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Wavelength

Frequency

Intensity of wave

Nature of wave

Good acoustic implies

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Obtaining as much reverberations as possible

Making the reverberation as small as possible

Obtaining the optimum of reverberations

Eliminating reverberations

Tuning fork is a source of.

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Heat

Energy

Light

Sound

Which effect explain the frequency shift that occurs when there is motion sound a listener or both relative to the medium.

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Early effect

Doppler's effect

Hall effect

Zeeman effect

Which of the following is nearly monochromatic light.

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Light from fluorescent tube

Light from neon lamp

Light from sodium lamp

Light from simple lamp

In a diffraction pattern, the width of any fringe

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Is directly proportional to slit width

Is inversely proportional to slit with

Has no dependence on slit width

Is zero

The same notes being played on sitar and veena differ in.

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Pitch

Quality

Both quality and pitch

Neither quality nor pitch

Stationary waves are produced when two identical waves are moving on the string.

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Along the same direction

Along the opposite direction

Along the perpendicular direction

Of length 1 m

A wave reflected from the boundary of a denser medium will have phase change

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45 ^o

60^o

90 ^o

180 ^o

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