In a dynamo
mechanical energy is converted to light energy
mechanical energy is converted to heat energy
mechanical energy is converted to electrical energy
electrical energy is converted to mechanical energy
Correct Answer :
C. mechanical energy is converted to electrical energy
Related Questions
The colour of the light which travels through glass with minimum speed is
red
violet
green
yellow
A wire conveying a current deflects a pivoted magnetic needle. This was discovered by
Marconi
Oersted
Faraday
Ohm
The frequency of an ultrasonic wave is
the same as that of an audible sound
above the audible range
below the audible range
None of the above
The focal length or lens or the eye is under the control or the
iris
pupil
ciliary body
cornea
In a freezer ice cubes will be formed more quickly in trays made of
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aluminium
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The aneroid barometer uses
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alcohol
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less than
greater than
equal to
greater than or equal to
When one enters a dark room after being in bright light one is not able to see anything clearly for a while because
the retina of the eye moves forward
the retina of the eye moves backward
c).the iris is unable to dilate the pupil immediately to be able to see things
the eye has no power of accommodation
Nichrome is used in electric heaters and irons because
it resists oxidation when red hot
its melting point is high
it has got 60 times the resistance of copper
All the above
The period of a geostationary (synchronous) satellite orbiting the earth over the equator la
16 hours
12 hours
20 hours
24 hours
The transistor was invented by
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When a body Is taken to the poles from the equator, Its weight becomes
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An electric charge is measured in
coulomb
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volt
watt
Cosmic rays contain
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alpha particles
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All the above
The speed of sound in air at 0° C is approximately
4 x 10 8 m/s
1500 m/s
330 m/s
500 m/s
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there is no air
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All the above
Separating particles from a suspension is effected by
centrifugal force
frictional force
gravitational force
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The stem of a vibrating tuning fork is pressed against a sound box. Then
the loudness of the sound increases
the loudness remains the same
the loudness decreases
the sound suddenly stops
The Solar System lies near the edge of a galaxy known as
The Milky Way
Radio Galaxy
Andromeda Nebula
Magellanic Clouds
The distance between two bodies is halved. Now the force of attraction between them will be
half
one fourth
four times
two times
An electric kettle used for boiling hard water has a white scale deposited on its heating element. This consists or
sugar
sodium carbonate
common salt
carbonates of calcium and magnesium
If you want to open a door with les difficulty you push it
at the middle
at a point away from the hinge (near the rim)
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None of the above
The spectrum of white light can be studied by
a microscope
a telescope
a stereoscope
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In the visible spectrum which colour has the shortest wavelength?
Red
Blue
Yellow
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Saturn
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Earth
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The filament lamp is an example for
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incandescence
both (a) and (b)
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the fan produces convection currents of air
the air circulated by the fan quickens the evaporation of the moisture on our skin
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a photo film
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The line on earth's surface passing through the places having zero dip is called the magnetic equator. This passes through
Thumba
Delhi
Mumbai
Sriharikota