The loudness of a sound is determined by
Frequency
Amplitude
Speed
Wavelength
Correct Answer :
B. Amplitude
Related Questions
Echoes are produced by
the reflection of sound waves
the refraction of sound waves
the interference of sound waves
reverberation of sound waves
Air pressure is usually highest when the air is
warm and moist
cool and dry
warm and dry
cool and moist
Chronometer la an instrument to measure
heat
electric potential
time
distance between two points
Choose the scalar quantity from the following physical quantities
force
velocity
acceleration
speed
In the visible spectrum which colour has the shortest wavelength?
Red
Blue
Yellow
Violet
When water is cooled from 4�C to 2�C its density
increases
decreases
remains the same
first increases then decreases
Which of the following has the highest refractive index?
Crown glass
Water
Flint glass
Diamond
The cell that can be recharged, after it has run down, by passing a direct current through it from a source of current is
Voltaic cell
Leclanche cell
Dry cell
An accumulator
Of the following which has got the highest frequency?
ultraviolet rays
gamma rays
radio waves
infrared waves
The image formed by a plane mirror is
of the same size as the object
at the same distance behind the mirror as the object is in front of it
virtual and laterally inverted
All the above
The earth's nearest neighbour in space is
the Sun
the Moon
the Venus
the Mars
A person does not sink in the Dead Sea because
the sea contains a large amount of other salts besides sodium chloride
the density of the person is less than the density of the Dead Sea water
of the surface tension due to salt water in the Dead Sea
of difference in mass
The period of a geostationary (synchronous) satellite orbiting the earth over the equator la
16 hours
12 hours
20 hours
24 hours
A series of east moving still pictures can be made to appear as a moving picture because the eye
can focus very rapidly as pictures change
is quicker than the brain
can see two images separated only if the interval' between seeing them is more than' one-tenth of a second
can shut out some of the light
The Space Application Centre for training in Satellite Communication Technology is located at
Bangalore
Mumbai
Ahmedabad
New Delhi
When the velocity of a body is halved
its momentum is halved
its kinetic energy is halved
its acceleration is halved
its potential energy is halved
In an oil lamp, holes are provided below the chimney so that
necessary oxygen for burning of oil may be provided
the convection current of air may be maintained to keep the lamp burning
the brightness of the lamp may be increased
All the above
A piece of cork la embedded inside an ice block which floats in water. What will happen to the level of water when all ice melts?
It will go down
It will come up
It will remain at the same level
First it will go down and it will come up
'Acoustics' is a branch or study dealing with
historical sites
architecture
sound
trigonometry
In a freezer ice cubes will be formed more quickly in trays made of
rubber
plastic
aluminium
wood
The SI unit of electric current is
the ampere
the volt
the ohm
the coulomb
We always see only one side of the moon because
the sun comes in between the earth and moon
the moon is stationary
the time taken by the moon to rotate on its axis is the same as the time taken by it to revolve round the earth
moon revolves round the sun
The largest planet in the solar system is
Neptune
Uranus
Jupiter
Saturn
Drinks kept in a vacuum flask remain hot or cold as the case may be for a long time because
both walls are silvered on the vacuum side
there is vacuum between the double walls
the cork is a poor conductor of heat
of all the above
Which physical quantity is measured in watts
power
kinetic energy
momentum
impulse
One can be recognised by his voice alone due to the factor of
quality
amplitude
pitch
loudness
The hygrometer is an apparatus used for finding the
temperature of air
intensity of light
density of a liquid
relative humidity of the atmosphere
A proton is
the ionised hydrogen molecule
the nucleus of helium atom
the nucleus of hydrogen atom
the positive counterpart of electron
Cosmic rays are
powerful X-rays falling on the earth from space
ultraviolet rays from the sun
gamma rays from radioactive minerals
very energetic radiation falling upon the earth from outer space consisting chiefly of charged particles
The pressure of air at high altitude is less than the atmospheric pressure at the sea level. Hence the boning point of water at a hill top
is more than at sea level
is equal to that sea level
is less than at sea level
depends on the surrounding temperature