a convex mirror behind it
a concave lens behind it
a concave mirror in front of it
a concave mirror behind it
D. a concave mirror behind it
absorption of a neutron by a nucleus
breakup of the nucleus of a heavy atom into two nearly equal halves emitting two or three neutrons and releasing large amounts of nuclear energy in the process
the scattering of neutrons
formation of heavier nucleus
Earth and Mars
Venus and Earth
Mars and Jupiter
Moon and Mars
for automatically maintaining a steady temperature
for measuring electricity
to reduce the voltage of electricity
for producing heat
Evaporation at the surface causes cooling
The heat obsorbed at the surface is passed on to the bottom
Because of impurity in the water
Because of convection currents set up inside water
elliptical
a straight line
a parabola
a vertical line
Frequency
Amplitude
Speed
Wavelength
increases as the square root of the absolute temperature
decreases with temperature
is independent of temperature
None of these
the violet ray
the red ray
the green ray
the blue ray
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
rectilinear propagation of light
reflection
refraction
total internal reflection
increase
decrease
will not change
first increase and then decrease
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
Microphone converts sound energy into electrical energy.
Electric fan converts electrical energy into mechanical energy.
Battery converts chemical energy into electrical energy.
All the above
rubber
plastic
aluminium
wood
Radium
Radon
Uranium-238
Plutonium
It will go down
It will come up
It will remain at the same level
First it will go down and it will come up
radio waves and X-rays
ultraviolet light waves
visible light waves
All the above
the rise of temperature
rise of its frequency
decrease in humidity
fall of temperature
loudness
pitch
quality or timbre
All the above
increases
decreases
remains the same
is constant
power
velocity
energy widely used in nuclear physics
number of electrons
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
the immersed volume of the body
density of the liquid
acceleration due to the gravity at the place
All the above
altimeter
anemometer
dilatometer
potentiometer
increases
decreases
remains unchanged
first decreases then increases
40 years
50 years
76 years
80 years
the reflection of sound waves
the refraction of sound waves
the interference of sound waves
reverberation of sound waves
Daniell cell
Leclanche cell
Dry cell
All the above
the ampere
the volt
the ohm
the coulomb
Space ship
Lunar module
Radar
Rocket