Thorium
Uranium
Plutonium
Radium
A. Thorium
umbra
penumbra
image
black portion of light
these signals are electromagnetic in nature
these are not electromagnetic in nature
their wavelength is very large
they are not reflected by the ionosphere but pass through it
Copper
Lead
Tin
Iron
elliptical
a straight line
a parabola
a vertical line
momentum
velocity
acceleration
inertia
the forces of cohesion of the molecules within are very much less in them
the forces of cohesion are very large
the forces of adhesion are large
the forces of adhesion are less
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
about 75% of hydrogen
22% helium
traces of most other elements including oxygen, neon, carbon and nitrogen
All the above
the marching in steps will involve a big strain on them
the resonant vibrations caused by their marching can damage the bridge increasing the amplitude to dangerous proportions
the marching may obstruct other traffic
rumblings of their marching may disturb the surroundings
goes straight through without bending
gets deviated away from the normal
gets bent towards the normal
gets reflected
amplitude
vibration
frequency
phase
about 75% of hydrogen
22% helium
traces of most other elements including oxygen, neon, carbon and nitrogen
All the above
greater than the weight of the man
less than the weight of the man
same as the weight of the man
zero
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
electroplating
electrotyping
electrolysis
distillation
Coulomb
Gilbert
Volta
Rutherford
increases
decreases
remains the same
first increases and then decreases
helium
argon
hydrogen
oxygen
increases
decreases
remains the same
first increases then decreases
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
first
second
third
fourth
Sun
Jupiter
Mercury
Earth
The Milky Way
Radio Galaxy
Andromeda Nebula
Magellanic Clouds
increases as the square root of the absolute temperature
decreases with temperature
is independent of temperature
None of these
speed of sound is greater in steel than in air
speed of sound is greater in air than in steel
part of sound waves is reflected between rail tracks
the boy's ears are at a different distance from the source
an erect, virtual image of diminished size
an erect, real image of diminished size
an erect, real image of double size
a virtual image of double size
ultraviolet rays
gamma rays
radio waves
infrared waves
the violet ray
the red ray
the green ray
the blue ray
Neptune
Uranus
Jupiter
Saturn
convex mirrors
concave mirrors
concave lenses
lenses irrespective of types