to increase the current flow in a circuit
to decrease the current flow
to measure the flow of electric current
Either (a) or (b) above
D. Either (a) or (b) above
air
water
iron
vacuum
the necessary centrifugal force may be obtained from the horizontal component of the weight of the train
the frictional force between the track and the wheels is avoided
the necessary centripetal force may be derived from the horizontal component of the weight of the train
None of these
the size and shape of the room
the ability of the ceiling, walls and floor to exclude unwanted sound
the use of furnishings made of sound absorbing materials
All the above
a -rays
� -rays
? -rays
Cosmic rays
Nitrogen
Oxygen
Chlorine
Freon
they make the electric equipment more reliable and easier for servicing
a faulty part of a conventional circuit may be difficult to locate and repair
if a part of the integrated circuit fails the entire circuit is simply replaced
All the above
a reflecting elliptical portion
a reflecting spherical surface
a parabolic reflecting surface
a flat reflecting surface
Copper
Lead
Tin
Iron
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
protons and electrons
alpha particles
gamma rays
All the above
increase
decrease
remain unaffected
have its shape changed
increase
decrease
remain the same
None of the above
an altimeter
a fathometer
a hydrometer
a sonometer
linear motion
vibratory motion
rotational motion
None of the above
the square of the current
the resistance of the conductor
the time for which the current flows
All the above
Nebulae
Quasars
Meteors
Comets
a microscope
a telescope
a stereoscope
a spectroscope
is more than at sea level
is equal to that sea level
is less than at sea level
depends on the surrounding temperature
a microphone
a headphone
a phonograph
an amplifier
brown for earth, yellow for live, light blue for neutral
green for earth, yellow for live, brown for neutral
yellow for earth, green for live, brown for neutral
brown or red for live, light blue or black for neutral and green or yellow for earth
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
electrical energy into light energy
light energy into electrical energy
light energy into heat energy
electrical energy into heat energy
mininuclear reactor
a dynamo
a thermopile
solar cells
half
one fourth
four times
two times
about 75% of hydrogen
22% helium
traces of most other elements including oxygen, neon, carbon and nitrogen
All the above
lost all its potential energy and gained an equivalent amount of kinetic energy
gained potential energy and lost kinetic energy
gained kinetic energy as well as potential energy
lost kinetic energy as well as potential energy
amplitude
vibration
frequency
phase
Jupiter
Mercury
Venus
Sirius
conservation of mass
Newtonian law of action and reaction
conservation of angular momentum
None of the above
can focus very rapidly as pictures change
is quicker than the brain
can see two images separated only if the interval' between seeing them is more than' one-tenth of a second
can shut out some of the light