for automatically maintaining a steady temperature
for measuring electricity
to reduce the voltage of electricity
for producing heat
A. for automatically maintaining a steady temperature
Daniell cell
Leclanche cell
Dry cell
All the above
these signals are electromagnetic in nature
these are not electromagnetic in nature
their wavelength is very large
they are not reflected by the ionosphere but pass through it
linear motion
vibratory motion
rotational motion
None of the above
are good conductors of heat
are cheaper
are easily obtained
are bad conductors of heat
Mercury and Earth
Earth and Mars
Mars and Saturn
Mars and Jupiter
the speed with which it escapes cools it down
of the higher temperature of the surroundings
of sudden expansion causing loss of internal energy
there is no real fall in temperature
the resistance
the square of the current flowing through it
the time the current flows
All the above
for automatically maintaining a steady temperature
for measuring electricity
to reduce the voltage of electricity
for producing heat
a microphone
a headphone
a phonograph
an amplifier
Sir Isaac Newton
Columbus
Archimedes
Thomas Alva Edison
less than
greater than
equal to
greater than or equal to
turbulence caused by the wind
buoyancy of air
unequal pressures acting on it
sudden change in the direction of the wind
Crown glass
Water
Flint glass
Diamond
astrology
astrophysics
astrometry
Both (b) and (c) above
a high resistance
a very low resistance
no resistance at all
resistance of 400 ? w
alcohol is a poor conductor of heat
alcohol can be coloured for its level to be seen easily
its freezing point is very low
it will not stick to the glass tube
air
water
iron
vacuum
Thorium
Uranium
Plutonium
Radium
increases
decreases
remains the same
is constant
work is done against gravity
the steepness of the staircase isn't felt
gravity assists
there is no friction between the legs and steps
power
velocity
energy widely used in nuclear physics
number of electrons
for measuring relative density of liquids
by ships to pass on messages
for determining the depth of ocean bottoms etc.
by deaf people to aid hearing
increases
decreases
remains the same
first increases and then decreases
greater
less
the same
None of these
to keep it away from the hot compressor which is near the bottom
because of convenience
so that it can cool the whole interior by setting up convection currents
to prevent too much cooling
the gun moves forward
the gun jumps up
the gun does not move
the gun recoils with the same momentum as the bullet
Sirius
Vega
Rigel
Proxima Centauri
a parabola
a horizontal straight line
a vertical straight line
a circle
Rutherford
Bohr
Henri Bacquerel
Marie Curie
are good conductors of heat
are cheaper
are easily obtained
are bad conductors of heat