Cosmic rays
Infrared rays
All radiations of light
Ultra violet rays coming from the sun
D. Ultra violet rays coming from the sun
direct sun's rays
radiation from earth's surface
radiogenic heat (resulting from radioactive decay)
cosmic rays coming from space
elliptical
a straight line
a parabola
a vertical line
there is no change in volume
there is no change in temperature
heat is given out
there is no change of state
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
the material of the wire
the length of the wire
the cross section of the wire
All the above
velocity
momentum
acceleration
angular velocity
the square of the current
the resistance of the conductor
the time for which the current flows
All the above
the chemical reaction between the gases inside the bulb
the compressed gases inside rushing out suddenly
the air outside rushing in to fill the vacuum inside the bulb
None of the above
the temperature is low
there is no air
the pressure is low
All the above
to make it smooth and frictionless
to make it rust - proof
to reduce heat loss by radiation
to make it more durable
nuclear fusion
nuclear fission
Both (a) and (b) above
Neither (a) nor (b)
wide and shallow
narrow and shallow
wide and deep
narrow and deep
sound energy is converted into electrical energy
electrical energy is converted into sound energy
sound energy is converted into mechanical energy
mechanical energy is converted into sound energy
mininuclear reactor
a dynamo
a thermopile
solar cells
The Milky Way
Radio Galaxy
Andromeda Nebula
Magellanic Clouds
the mass of its bob
the material of the bob
the amplitude of vibration
acceleration due to the gravity at the site of experiment
Marconi
Baird
John Bardeen, Walter H. Brattain and William Shockley
Edison
diffusion
viscosity
surface tension
capillarity
planets do not have light of their own whereas stars shine by their own light
planets do not twinkle like stars
planets are much smaller than stars
All the above
light energy into electrical energy
electrical energy into light energy
magnetic energy into electrical energy
electrical energy into mechanical energy
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
light comes through circular gaps between the leaves
the leaves are circular
the rays bend to form circular spots
the gaps between the leaves act as pin holes
a neutron star
a binary star
a dwarf star
a polar star
about 75% of hydrogen
22% helium
traces of most other elements including oxygen, neon, carbon and nitrogen
All the above
temperature of air
intensity of light
density of a liquid
relative humidity of the atmosphere
conservation of mass
Newtonian law of action and reaction
conservation of angular momentum
None of the above
force
velocity
acceleration
speed
a convex mirror behind it
a concave lens behind it
a concave mirror in front of it
a concave mirror behind it
Bhaskara
Insat I-A
Aryabhatta
SLV-l
its momentum is halved
its kinetic energy is halved
its acceleration is halved
its potential energy is halved