18 km/s
11.2 km /s
21 km/s
35 km/s
B. 11.2 km /s
converts direct current into alternating current
converts alternating current into direct current
steps up or steps down a given alternating current voltage
supplies current with zero resistance
when the moon passes between the sun and the earth
when the sun comes between the earth and the moon
when the earth comes between the sun and the moon
on a full moon day
is found by measuring the slanting height of the mercury column
is given by the vertical height
cannot be measured with it
can be measured by both the methods described above
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
electric current - ampere
resistance - Ohm
electric power - volt
electric charge Coulomb
1
infinite
0
4
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
generally considered as a desert happening
caused by unequal heating of the several layers of the atmosphere above the desert
in which the refracted rays take a curved path resulting in total internal refection
All the above
in burglar alarms
in automotive devices for light switches
television cameras
All the above
�± -rays
�² -rays
�³ -rays
X-rays
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
linear motion
vibratory motion
rotational motion
None of the above
increases as the square root of the absolute temperature
decreases with temperature
is independent of temperature
None of these
the mass number
atomic number
atomic weight
absolute number
it can be transmitted easily and efficiently
Alternating Current (AC) loses the least amount of energy when transmitted at high voltages
Alternating Current (AC) voltage can be easily increased or decreased
all the above
a neutron star
a binary star
a dwarf star
a polar star
chemical, heating and magnetic effects of electricity
discharge of electricity through gases
the action of ultraviolet radiation on certain fluorescent materials
Both (b) and (c) above
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
equal to its focal length
equal to its radius of curvature
equal to the reciprocal of its focal length (in metres)
equal to twice its focal length
elliptical
a straight line
a parabola
a vertical line
Mercury and Earth
Earth and Mars
Mars and Saturn
Mars and Jupiter
reverberate
be heard by us faintly
be heard upto 10 km from it
not be heard at any distance at all from it
Pyrometer
Eudiometer
Barometer
Hydrometer
cannot be attained experimentally
can be attained
is impossible
Does not exist at all
Marconi
Baird
John Bardeen, Walter H. Brattain and William Shockley
Edison
Bhaskara
Insat I-A
Aryabhatta
SLV-l
quinine sulphate solution
paraffin oil
fluorescein solutions
All the above
speed
frequency
wavelength
All the above
mininuclear reactor
a dynamo
a thermopile
solar cells
work is done against gravity
the steepness of the staircase isn't felt
gravity assists
there is no friction between the legs and steps