Question # 1

The energy is transferred from one place of another:

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through matter

through waves

both a and b

through vacuum

the part of waves at which particles of the medium are below the normal position are called:

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extreme position

crest

trough

compression

1 MB =

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1022KB

1023KB

1024KB

1025KB

Ripple tank is an instrument which is used to study the characteristics of:

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Mechanical waves

Light waves

Radio waves

Electro-magnet waves

The disturbance travelling in a medium is called:

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Wave motion

Simple harmonic motion

Motion

both a and b

The intensity of lawn mover is:

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10^-1 wm^-2

10^-2wm^-2

10^-1wm^-3

10^-3wm^-2

Which form of energy is sound?

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Electrical

Mechanical

Thermal

Chemical

When frequency of sound wave is increased, which of the following decreases?

i) Wavelength ii) Period iii) Amplitude

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i only

(iii) only

i and ii only

i and iii only

The frequency of silent whistle is:

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20,000 Hz - 25000 Hz

2000 Hz - 25000 Hz

200 Hz - 2000 Hz

25000 Hz

Mathematical formula of sound level (in bel) is:

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S.L = 10 log I/Io (bel)

S.L = K log I/Io (bel)

S.L = Log I/Io (bel)

S.L = 10 log Io/I (bel)

The speed of sound was accurately measured in:

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1736

1737

1738

1739

The oscillations of a system in the presence of which force are called damp oscillations:

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Resistive force

Attractive force

Coulomb force

Both a and b

Old people can not hear sound above then _____ Hz

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1000

15000

20000

10000

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