for measuring relative density of liquids
by ships to pass on messages
for determining the depth of ocean bottoms etc.
by deaf people to aid hearing
C. for determining the depth of ocean bottoms etc.
amplitude
vibration
frequency
phase
good conductor of heat
good conductor of electricity
bad conductor of electricity
Both (a) and (b) above
steel
wood
soft iron
copper
Proxima Centauri
Sirius
Aldebaran
Vega
Joule
Newton
Joule/Sec
Erg/Sec
the same as the direction of the vibrations of the vibrating body
at right angles to the direction of the vibrations of the vibrating body
Both (a) and (b) above
None of the above
of the surface tension of mercury
mercury is a semi-solid
of the high viscosity of mercury
the density of mercury is greater than that of steel
in medical and surgical diagnosis
in testing the quality of the linings and pads used in vehicles and aircraft brakes
to clean surgical instruments, jewellery and similar articles
All the above
a parabola
a horizontal straight line
a vertical straight line
a circle
electrons
neutrons
neutrons and electrons
electrons, neutrons and other particles
Red
Blue
Yellow
Violet
sterilising food stuff
controlling pests
cancer therapy
All of these
a -rays
� -rays
? -rays
X-rays
umbra
penumbra
image
black portion of light
in medical and surgical diagnosis
in testing the quality of the linings and pads used in vehicles and aircraft brakes
to clean surgical instruments, jewellery and similar articles
All the above
Sir Isaac Newton
Kepler
Copernicus
Ptolemy
cohesive forces between the mercury molecules are greater than adhesive forces between mercury and glass molecules
the adhesive forces between mercury and glass molecules are greater than the cohesive forces
both the cohesive and adhesive forces are equal
None of the above
oxidation of the tungsten filament
bursting of the bulb
loss of light due to absorption
keeping the weight of the bulb less
rectilinear propagation of light
reflection
refraction
total internal reflection
frequency is higher
wavelength is smaller
pitch is smaller
air is warmer
a reflecting elliptical portion
a reflecting spherical surface
a parabolic reflecting surface
a flat reflecting surface
1985
1957
1959
1960
the time for the upward journey and downward journey are the same
the upward journey takes more time
the downward journey takes more time
Can't be said
troposphere
stratosphere
mesosphere
ionosphere
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
travelling in opposite direction
of slightly different frequencies
of equal wavelength
of equal amplitude
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
meteors
binaries
variable stars
bright stars
electricity may not leak
there may be smooth flow of electricity
a short circuit may be prevented
current may pass to the earth in case of a short circuit without doing any harm to the person
insulators
semiconductors
superconductors
condenser