Parabolic
Convex
Concave
Plain
B. Convex
Galileo
Bhaskara
Aryabhatta
Ptolemy
alternating current of very high frequency
alternating current of very high voltage
a very large direct current
a high voltage direct current
conduction
convection
radiation
sublimation
insulators
semiconductors
superconductors
condenser
will jump rapidly up and down for a short time
will remain unaffected
Both (a) and (b) above
It will produce electric shock
insulators
semiconductors
superconductors
condenser
the Sun
the Moon
the Venus
the Mars
enclosing it in a thick walled iron box
wrapping it with an insulator
by placing it inside a glass case
by surrounding it with fine copper gauze
the surface of ice is smooth
ice is cold
the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
the pressure on the ice due to skate raises its melting point
cools the body that transfers it
heats the body that absorbs the heat
may change the physical state of the substance
All the above
glass allows the heat radiations of shorter wavelengths from the sun to pass through
the plants absorb them - these shorter wavelengths - and reradiate them in the form of longer wavelengths
the longer wavelengths cannot penetrate through the glass walls
All the above
rectilinear propagation of light
reflection
refraction
total internal reflection
ultraviolet rays
gamma rays
radio waves
infrared waves
increase
decrease
will not change
first increase and then decrease
the centripetal force
the centrifugal force
the frictional force
All the above
centrifugal force
frictional force
gravitational force
distillation
Thumba
Bangalore
Ahmedabad
New Delhi
about 75% of hydrogen
22% helium
traces of most other elements including oxygen, neon, carbon and nitrogen
All the above
centrifugal force
frictional force
gravitational force
distillation
in hospital in the treatment of malignant growth
to reveal hidden flaws in metal castings and welded joints
to detect alterations made in works of art
All the above
goes straight through without bending
gets deviated away from the normal
gets bent towards the normal
gets reflected
increases the melting point of ice
decreases the melting point of ice
has no effect on the melting point of ice
increases the volume of the ice
telescope
spectrometer
microscope
periscope
in hospital in the treatment of malignant growth
to reveal hidden flaws in metal castings and welded joints
to detect alterations made in works of art
All the above
electrons
neutrons
neutrons and electrons
electrons, neutrons and other particles
the temperature is low
there is no air
the pressure is low
All the above
Ammeter
Altimeter
Adrinometer
Anemometer
212°
32°
-40°
0°
collision between molecules of filled gas under electric current
heavy current
vacuum inside the tube
falling of ultra violet rays on the white inner coating of the tube
mercury thermometers
alcohol thermometers
platinum resistance thermometers
thermoelectric thermometers