Enriched uranium means
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
Correct Answer :
C. Uranium in which the concentration of the isotope U-235 is more than in the naturally occuring uranium
Related Questions
The Solar System lies near the edge of a galaxy known as
The Milky Way
Radio Galaxy
Andromeda Nebula
Magellanic Clouds
A device used to measure heights above sea level is known as
altimeter
anemometer
dilatometer
potentiometer
Rays similar to X-rays but of smaller wave length that are given off by radioactive substances are
a -rays
� -rays
? -rays
Cosmic rays
When water is cooled from 4�C to 2�C its density
increases
decreases
remains the same
first increases then decreases
A cyclist leans inwards when he is negotiating a curve 10 that
he may increase his speed
his weight may be reduced
necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion
no frictional force may be produced between the wheels and the axle
When ice melts, Its volume
decreases
increases
remains the same until all the ice has melted and then increases
remains the same
Tea pots are highly polished
so that they may reflect thermal radiation from outside and minimise such radiation from them
so that they may absorb all radiation from outside
to make them attractive to look at
because they take high polish
Drinks kept in a vacuum flask remain hot or cold as the case may be for a long time because
both walls are silvered on the vacuum side
there is vacuum between the double walls
the cork is a poor conductor of heat
of all the above
The resistance of a wire depends on
the material of the wire
the length of the wire
the cross section of the wire
All the above
Separating particles from a suspension is effected by
centrifugal force
frictional force
gravitational force
distillation
A bar magnet tied in the middle with a thread is suspended at the South Pole of the earth. The magnet will be in
a horizontal position
a nearly vertical position with its South Pole downwards
a nearly vertical position with its North Pole downwards
a slanting position
If you want a sound proof room, the walls should be
able to refract the sound
good absorbers of sound
good reflectors of sound
All the above
Raindrops assume a spherical shape because or
adhesion
surface tension
gravitational force
atmospheric pressure from all sides
The planet that is known as earth's twin is
Mercury
Venus
Moon
Mars
The minimum velocity required by a satellite to escape earth's gravitational pull is
18 km/s
11.2 km /s
21 km/s
35 km/s
The loudness of a sound is determined by
Frequency
Amplitude
Speed
Wavelength
X-rays are used
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
The maximum range of most TV signals is from 121 to 240 km only because
the curvature of earth limits the range of reception
the signals are weak
the signals are absorbed by air
the antennae are not powerful enough
The planet that spins Caster than any other planet is
Saturn
Jupiter
Earth
Mercury
Stars twinkle because of
refraction of light from them through air
reflection
absorption
All the above
Expansion of a rod when heated
is proportional to its original length
is proportional to the increase of temperature
is inversely proportional to its original length
Both (a) and (b) above
Sound waves in air are
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
The period of oscillation of a simple pendulum depends upon
the mass of its bob
the material of the bob
the amplitude of vibration
acceleration due to the gravity at the site of experiment
Which of the following is fissionable?
U-234
U-235
U-238
Both (b) and (c)
Photo-electric cells convert
electrical energy into light energy
light energy into electrical energy
light energy into heat energy
electrical energy into heat energy
A transformer
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
The brightest star visible to the naked eye is
Sirius
Vega
Rigel
Proxima Centauri
Acoustics' la a branch or study dealing with
historical sites
architecture
sound
trigonometry
When the earth reaches its perihelion
it is nearest to the moon
it is nearest to the sun
it is nearest to Pluto
it is farthest from the sun
X-rays are
deflected by electric field
deflected by magnetic field
slightly deflected by electric field and magnetic field
not deflected by electric and magnetic fields