velocity
wavelength
frequency
Both (a) and (b) above
they contain free electrons
their atoms are relatively far apart
their atoms collide frequently
they have reflecting surfaces
Silver
Copper
Nichrome
Dry wood
the mountains found on the surface of the Sun
the dark patches on the sun having less temperature than the normal sun's surface
ionized gas found near the solar surface
the magnetic storms on the surface of the Sun
the square of the current
the resistance of the conductor
the time for which the current flows
All the above
quality
amplitude
pitch
loudness
Pyrometer
Eudiometer
Barometer
Hydrometer
the nature of the liquid
area of the exposed surface of the liquid
temperature of air and of the liquid
All the above
is more than at sea level
is equal to that sea level
is less than at sea level
depends on the surrounding temperature
short sight
long sight
astigmatism
presbyopia
James Clerk Maxwell
Heinrich Hertz
Thomas Alva Edison
Baird
cohesive
centrifugal
frictional
gravitational
in air
in an atmosphere of oxygen
in an atmosphere of CO2
in vacuum
18 km/s
11.2 km /s
21 km/s
35 km/s
is found by measuring the slanting height of the mercury column
is given by the vertical height
cannot be measured with it
u) can be measured by both the methods described above
watt
degree
joule
erg
an electrophorus
an electroscope
an electromagnet
an ammeter
Nebulae
Quasars
Meteors
Comets
elliptical
a straight line
a parabola
a vertical line
protons and electrons
alpha particles
gamma rays
All the above
helium
argon
hydrogen
oxygen
cool the engine
heat up the engine
start the car
moderate the speed
it is lighter
it has more water vapour in it
its molecules are close together
its molecules are far apart
Rutherford
Bohr
Henri Bacquerel
Marie Curie
maximum at the equator
minimum at the equator
minimum at the poles
the same everywhere
the eye lens being thin
the eye lens being thick
lack of symmetry in the curvature of the eye preventing rays of light from being brought to a common focus
the pupil being very small
it has no population
it is quite far off
its surface is full of rocks
its gravity is not sufficient for any atmosphere to hold on to it
a straight line
an ellipse
a circle
a parabola
cannot be attained experimentally
can be attained
is impossible
Does not exist at all
the ionised hydrogen molecule
the nucleus of helium atom
the nucleus of hydrogen atom
the positive counterpart of electron