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
A. when the moon passes between the sun and the earth
Television - Baird
Transistor ~ Shockley
Thermometer - Celsius
Barometer Torricelli
0°
30°
45°
60°
Jupiter
Mars
Mercury
Saturn
it is practically inexhaustible
it is the cheapest form of energy
it does not cause pollution
All of the above
velocity
momentum
acceleration
angular velocity
the loudness of the sound increases
the loudness remains the same
the loudness decreases
the sound suddenly stops
troposphere
stratosphere
mesosphere
ionosphere
is real
is virtual
can be obtained on a screen
is slightly bigger than the object
distance from the earth
age
temperature
size
chemical energy into heat energy
mechanical energy into heat energy
protons into neutrons
mass into energy according to Einstein's equation
an altimeter
a fathometer
a hydrometer
a sonometer
iris
pupil
ciliary body
cornea
Proxima Centauri
Sirius
Aldebaran
Vega
increases
decreases
remains the same
first increases and then decreases
colours of the rainbow
colours in the spectrum of white light
colours which cannot be produced by mixing other colours
colours found in nature
sugar
sodium carbonate
common salt
carbonates of calcium and magnesium
a reflecting elliptical portion
a reflecting spherical surface
a parabolic reflecting surface
a flat reflecting surface
the telephone ear piece
the telegraph
the electric bell
All the above
its density
its temperature
its elasticity
All the above
nichrome
tungsten
copper
aluminium
able to refract the sound
good absorbers of sound
good reflectors of sound
All the above
electrical energy into heat energy
electrical energy into mechanical energy
mechanical energy into electrical energy
mechanical energy into heat energy
will increase
will decrease
does not change
varies with the increase of depth of the immersion of the iron piece
James Clerk Maxwell
Heinrich Hertz
Thomas Alva Edison
Baird
speed
frequency
wavelength
All the above
ACBD
ABCD
CABD
BACD
increase
decrease
remain unaffected
have its shape changed
same number of protons but different number of neutrons
same number of neutrons but different number of protons
the same total number of protons and neutrons
same number of protons and different number of electrons
copper
tungsten
mica
nichrome
capillarity
cohesion
adhesion
viscosity