Heat is transmitted from one end of a metal rod to its other end by the method of
conduction
convection
radiation
sublimation
Correct Answer :
A. conduction
Related Questions
The power of a lens is
equal to its focal length
equal to its radius of curvature
equal to the reciprocal of its focal length (in metres)
equal to twice its focal length
Red Light is used as a dancer signal because
it is pleasing to the eye
it has a traditional colour
it is easily distinguishable
it is most sensitive to the human eye
When we tighten the string of a sitar or tanpura its pitch
remains the same
increases
decreases
None of the above
The unit of power in SI is
Joule
Newton
Joule/Sec
Erg/Sec
For accurate scientific work, temperatures are often measured by
mercury thermometers
alcohol thermometers
platinum resistance thermometers
thermoelectric thermometers
If you want a sound proof room, the walls should be
able to refract the sound
good absorbers of sound
good reflectors of sound
All the above
The neutron, one of the constituent particles of which the nuclei of atoms are composed was discovered by
Irene Curie
W Bothe and H Becker
James Chadwick
Jean Joliot
Besides protons, the nucleus of an atom contains
electrons
neutrons
neutrons and electrons
electrons, neutrons and other particles
Which metal is used in storage batteries?
Copper
Lead
Tin
Iron
The rate of cooling of a hot body depends on
the nature of the radiating surface
area of the radiating surface
temperature difference between the body and the surroundings
All the above
The filament lamp is an example for
fluorescence
incandescence
both (a) and (b)
None of these
Sound waves in air are
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
The cover of a solar cooker is made of glass because
it absorbs sun's rays
it reflects sun's rays
it retains the heat inside by the greenhouse effect
it radiates heat better than metals
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
The property of a fluid by which it resists relative motion within itself is known as
cohesive force
surface tension
diffusion
viscosity
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
The aneroid barometer uses
mercury
distilled water
alcohol
does not use any liquid
Air pressure is usually highest when the air is
warm and moist
cool and dry
warm and dry
cool and moist
An integrated circuit la more advantageous than a conventional circuit because
they make the electric equipment more reliable and easier for servicing
a faulty part of a conventional circuit may be difficult to locate and repair
if a part of the integrated circuit fails the entire circuit is simply replaced
All the above
The coil of an electric heater is made of
Platinum
Tungsten
Nichrome
Copper
The best estimates of the age of the earth comes from the studies of
angle of inclination of the earth
changes in radio-active minerals in it
period taken by Sun's light to reach the earth
artificial satellites revolving round the earth
When a ship floats on water, the weight or water displaced is
an indeterminate quantity
equal to the weight of the ship
greater than the weight of the ship
less than the weight of the ship
The radius of an atom is approximately
10-10 cm
10-12 cm
10-13 cm
10-16 cm
Which of the following is not electromagnetic waves?
heat waves
sound waves
radio waves
light waves
The Indian Satellite System used for domestic communications, television and meteorology is known as
INSAT
Bhaskara
Aryabhatta
All the above
X-rays were discovered by
Wilhelm Roentgen
WO Coolidge
Henry Cavendish
William Watson
The colour or an opaque object is due to the colour it
absorbs
refracts
reflects
scatters
The aneroid barometer uses
mercury
distilled water
alcohol
does not use any liquid
The focal length or lens or the eye is under the control or the
iris
pupil
ciliary body
cornea
The largest reserve of radioactive element which can be used in a nuclear reactor has been found in India, The name of the element is
Thorium
Uranium
Plutonium
Radium