equal to half its focal length
equal to its focal length
twice its focal length
not related to its focal length
C. twice its focal length
sound energy is converted into electrical energy
electrical energy is converted into sound energy
sound energy is converted into mechanical energy
mechanical energy is converted into sound energy
Marconi
Oersted
Faraday
Ohm
for automatically maintaining a steady temperature
for measuring electricity
to reduce the voltage of electricity
for producing heat
when the moon passes between the sun and the earth
when the sun comes between the earth and the moon
when the earth comes between the sun and the moon
on a full moon day
Platinum
Tungsten
Nichrome
Copper
their heat contents
their masses
their temperatures
whether they are in solid, liquid or gaseous state
the floor and carpet are at different temperatures
the stone conveys the heat away from the feet more rapidly than the carpet
the carpet is a better conductor of heat than the stone
the human body maintains a constant temperature
to stabilise the voltage
to decrease the current supply
to increase the current supply
to prevent an unduly high current from passing through a circuit
sinks less in the sea
sinks more in the sea
neither sinks more nor less in the sea
sinking more or less depends on sea
conservation of mass
Newtonian law of action and reaction
conservation of angular momentum
None of the above
rubber
plastic
aluminium
wood
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
it is pleasing to the eye
it has a traditional colour
it is easily distinguishable
it is most sensitive to the human eye
astrology
astrophysics
astrometry
Both (b) and (c) above
a horizontal position
a nearly vertical position with its South Pole downwards
a nearly vertical position with its North Pole downwards
a slanting position
a -rays
� -rays
? -rays
X-rays
no charge
positive charge
negative charge
can't be said
a microscope
a telescope
a stereoscope
a spectroscope
are good conductors of heat
are cheaper
are easily obtained
are bad conductors of heat
resistor
thermocouple
light bulb
neon tube
zero
the centrifugal force
reaction due to steady burning of fuel
the gravitational pull on the body by the earth is the weight of the body which provides the centripetal force
the ice that deposits on the freezer
the evaporation of a volatile liquid
None of the above
Both (a) and (b)
the violet ray
the red ray
the green ray
the blue ray
similar charges of electricity rush towards each other and then get repelled
clouds strike against impurities in air and the friction burns up these impurities
strong opposite charges in different clouds break down the resistance offered by the intervening air
water vapour produces electricity in the clouds
a unit of time
a unit of length
a year of no consequence
illumination throughout the year
0°
30°
45°
60°
for automatically maintaining a steady temperature
for measuring electricity
to reduce the voltage of electricity
for producing heat
Cosmic rays
Infrared rays
All radiations of light
Ultra violet rays coming from the sun
red
violet
green
yellow
its atmosphere
its distance from the sun
its rotation
All the above