reduction of seating capacity in the hall
increase of sound intensity in the hall
lining the walls, with leather panels put on over a layer of sound absorbent glass fibre
by opening the doors and windows of concert hall
C. lining the walls, with leather panels put on over a layer of sound absorbent glass fibre
Sir Isaac Newton
Kepler
Copernicus
Ptolemy
convex mirrors
concave mirrors
convex lens
concave lens
able to refract the sound
good absorbers of sound
good reflectors of sound
All the above
replace the fuse by a thin wire
replace the fuse by a thick copper wire
replace the fuse by a fuse wire of proper rating
replace the fuse by nichrome wire
Rutherford
Bohr
Henri Bacquerel
Marie Curie
helium
argon
hydrogen
oxygen
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
sterilising food stuff
controlling pests
cancer therapy
All of these
U-234
U-235
U-238
Both (b) and (c)
a reflecting elliptical portion
a reflecting spherical surface
a parabolic reflecting surface
a flat reflecting surface
in the live wire
in the neutral wire
in the earth wire
anywhere
fluorescence
incandescence
both (a) and (b)
None of these
does not allow the lightning to fall on the building at all
drives away the charged clouds
forces the lightning to fall on other buildings near that building
conducts the electric charges to the ground when lightning strikes the building
ultraviolet rays
gamma rays
radio waves
infrared waves
Uranium that is very pure
Uranium in which the concentration of the isotope U-238 is more than in the naturally occuring uranium
Uranium in which the concentration of the isotope U-235 is more than in the naturally occuring uranium
None of the above
The Milky Way
Radio Galaxy
Andromeda Nebula
Magellanic Clouds
maximum at the equator
minimum at the equator
minimum at the poles
the same everywhere
outward stream of protons and electrons on the surface of the sun during solar flares and sun-spot activity
plasma
ionized gas
All of these
necessary oxygen for burning of oil may be provided
the convection current of air may be maintained to keep the lamp burning
the brightness of the lamp may be increased
All the above
its atmosphere
its distance from the sun
its rotation
All the above
travelling in opposite direction
of slightly different frequencies
of equal wavelength
of equal amplitude
Sir Isaac Newton
Columbus
Archimedes
Thomas Alva Edison
an ammeter
a rheostat
a voltmeter
a voltameter
cools the body that transfers it
heats the body that absorbs the heat
may change the physical state of the substance
All the above
of the same size as the object
at the same distance behind the mirror as the object is in front of it
virtual and laterally inverted
All the above
Pascal's law
Bernoulli's law
Archimedes' law
Boyle's law
Daniell cell
Leclanche cell
Dry cell
All the above
kinetic energy
potential energy
momentum
both potential and kinetic energy
a microscope
a telescope
a stereoscope
a spectroscope
Thumba
Delhi
Mumbai
Sriharikota