Question # 1

The frequency of the fundamental mode of transverse vibration of a stretched wire 1,000 mm long is 256 Hz When the wire is shortened to 400 mm at the same tension

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640 Hz

680 Hz

720 Hz

780 Hz

What is an elementary particle, the basic unit of light and all other form of electromagnetic radiation.

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Phonon

Photon

Neutron

Proton

Which of the title for combining of notes that produce jarring effect on the ear.

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Noise

Melody

Harmony

Discord

In the experiment of production od x rays electrons are accelerated towards the anode by

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Thermionic emission

Potential difference

Breaking potential

Cut of currrent

Distance between two consecutive nodes or antinodes is equal to.

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Lamda /4

Lamda

Lamda /2

2 lamda

Which of the following are examples of transverse and a longitudinal wave.

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Radio and sound waves

Radio and light waves

Light and water ripples

Light and sound waves

Interference through thin films depends upon

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Thickness of thin film

Nature of material of thin film

angle of incident light

All of the above

Which form of electromagnetic radiation is used in RADAR.

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Long wavelength ultraviolet waves

short wavelength microwaves

short wavelength infrared wave

Long wavelength radiowaves

Three tuning forks of frequencies 400 Hz. 401 Hz and 402 Hz are sounded together The frequency of beats per sound is.

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0

1

2

3

Light product by a single Nicole is

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Unpolarized

Plane polarized

Circulatory polarized

Elliptically polarized

A large ripple tank with a vibrator working at a frequency of 30 Hz produce 25 complete waves in a distance of 50 cm. The velocity of the wave is.

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9.53 cm s-1

60 cm s-1

750 cm s-1

1500 cm s-1

X-rays can cause

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Malaria

Dysentery

Cancer

Blood pressure

Which is the best sound source to produce a pure note.

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Tuning fork

Flute

Drum

Harmonium

What is shapes of a pure note

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Sinwave

Sawtooth

Square wave

Triangular wave

The appearance of colures in their film is due to

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Diffraction

Dispersion

Interference

Polarization

Which technique uses underwater sound propagation to detect and locate submerged objects.

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RADAR

LIDAR

SONAR

LASER

Two waves of the same frequency and amplitude travelling in opposites directions along the same path in the same medium produce.

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Stationary waves

Transverse wave

Longitudinal waves

Compressional waves

The phase velocity is the velocity of a point that moves with a wave at constant phase it is also called.

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Phase speed

Wave speed

Wave velocity

All of these

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

When temperature increases, frequency of an organ pipe

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Decreases

Increases

Remain the same

Become zero

A fringe is a path of.

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Constant amplitude

Constant phase

Same wavelength

Constant frequency

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