the square of the current
the resistance of the conductor
the time for which the current flows
All the above
D. All the above
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
nuclear fusion
nuclear fission
Both (a) and (b) above
Neither (a) nor (b)
oxidation of the tungsten filament
bursting of the bulb
loss of light due to absorption
keeping the weight of the bulb less
as soon as he hears the report of the gun
the moment he sees the flash
either (a) or (b) since that makes no difference
None of the above
its momentum is halved
its kinetic energy is halved
its acceleration is halved
its potential energy is halved
Michael Faraday
Torricelli
Thomas Alva Edison
Benjamin Franklin
heat waves
sound waves
radio waves
light waves
in air
in an atmosphere of oxygen
in an atmosphere of CO2
in vacuum
reverberate
be heard by us faintly
be heard upto 10 km from it
not be heard at any distance at all from it
decreases
increases
remains the same until all the ice has melted and then increases
remains the same
Neptune and Pluto
Jupiter and Saturn
Venus and Mars
Venus and Saturn
its density being very high 13.6 g/cm3 the height of mercury column is conveniently small
at the ordinary temperature its vapour pressure is small
it is opaque and does not wet glass
All the above
cohesive forces between the mercury molecules are greater than adhesive forces between mercury and glass molecules
the adhesive forces between mercury and glass molecules are greater than the cohesive forces
both the cohesive and adhesive forces are equal
None of the above
lead
zinc
carbon
tin
increases
decreases
remains the same
first increases and then decreases
equal to half its focal length
equal to its focal length
twice its focal length
not related to its focal length
proton
antiproton
positron
neutron
Coulomb
Gilbert
Volta
Rutherford
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
linear motion
vibratory motion
rotational motion
None of the above
cohesive forces between the mercury molecules are greater than adhesive forces between mercury and glass molecules
the adhesive forces between mercury and glass molecules are greater than the cohesive forces
both the cohesive and adhesive forces are equal
None of the above
cannot be attained experimentally
can be attained
is impossible
Does not exist at all
nichrome
tungsten
copper
aluminium
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
0° C
-15° C
4° C
15° C
it stops due to malfunctioning
it starts emitting dangerous radioactive radiations
it is shut down to avoid explosion
it is ready to produce controlled energy
Ammeter
Altimeter
Adrinometer
Anemometer
altimeter
anemometer
dilatometer
potentiometer
in hospital in the treatment of malignant growth
to reveal hidden flaws in metal castings and welded joints
to detect alterations made in works of art
All the above
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