so that they may reflect thermal radiation from outside and minimise such radiation from them
so that they may absorb all radiation from outside
to make them attractive to look at
because they take high polish
A. so that they may reflect thermal radiation from outside and minimise such radiation from them
a microscope
a telescope
a stereoscope
a spectroscope
the nature of the radiating surface
area of the radiating surface
temperature difference between the body and the surroundings
All the above
to increase the current flow in a circuit
to decrease the current flow
to measure the flow of electric current
Either (a) or (b) above
A. Anemometer | 1. Measurement of power |
B. Tachometer | 2. Wind speed |
C. Dynamometer | 3. Revolutions per minute |
D. Barometer | 4. Atmospheric pressure |
* | 5. Current from a dynamo |
A-1 B-3 C-5 D-4
A-2 B-1 C-3 D-4
A-2 B-3 C-1 D-4
A-1 B-3 C-5 D-2
Marconi
Baird
John Bardeen, Walter H. Brattain and William Shockley
Edison
16 hours
12 hours
20 hours
24 hours
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
the hot water contains a much larger quantity of internal energy than the boiling water
the boiling water contains more quantity of internal energy than the warm water
both of them have got the same amount of internal energy.
nothing can be said definitely with the data given
good conductor of heat
good conductor of electricity
bad conductor of electricity
Both (a) and (b) above
1985
1957
1959
1960
watt
degree
joule
erg
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
the curvature of earth limits the range of reception
the signals are weak
the signals are absorbed by air
the antennae are not powerful enough
a quantum of light energy
a quantum of matter
a positively charged atomic particle
another name for positron
cohesive
centrifugal
frictional
gravitational
will jump rapidly up and down for a short time
will remain unaffected
Both (a) and (b) above
It will produce electric shock
conservation of mass
Newtonian law of action and reaction
conservation of angular momentum
None of the above
Thumba
Delhi
Mumbai
Sriharikota
force on each square centimetre of the small piston is less than the force on each square centimetre of the large piston
the distance the small piston moves is equal to the distance the large piston moves
applied pressure is equally transmitted throughout the liquid in all directions
force acting on small piston is equal to the force acting on large piston
equal to half its focal length
equal to its focal length
twice its focal length
not related to its focal length
it has high thermal conductivity
it has uniform expansivity
it has high boiling point and low freezing point
of all the above
is proportional to its original length
is proportional to the increase of temperature
is inversely proportional to its original length
Both (a) and (b) above
ultraviolet rays
gamma rays
radio waves
infrared waves
velocity of sound
velocity of light
a constant factor
wavelength of light
for measuring the velocity of wind
in the manufacture of fireworks
in finding the coefficient of apparent expansion of a liquid
for measuring high temperatures
kinetic energy
potential energy
acceleration
All the above
it is lighter
it has more water vapour in it
its molecules are close together
its molecules are far apart
Platinum
Tungsten
Nichrome
Copper
generally considered as a desert happening
caused by unequal heating of the several layers of the atmosphere above the desert
in which the refracted rays take a curved path resulting in total internal refection
All the above
it can be transmitted easily and efficiently
Alternating Current (AC) loses the least amount of energy when transmitted at high voltages
Alternating Current (AC) voltage can be easily increased or decreased
all the above