The leader of the team who succeeded in constructing the first nuclear reactor (an atomic pile) in the world was
Albert Einstein
Enrico Fermi
HJ Bhabha
Sir Isaac Newton
Correct Answer :
B. Enrico Fermi
Related Questions
In very cold countries alcohol is used as a thermometric liquid because
alcohol is a poor conductor of heat
alcohol can be coloured for its level to be seen easily
its freezing point is very low
it will not stick to the glass tube
Solar radiation is preferred to other sources of energy because
it is practically inexhaustible
it is the cheapest form of energy
it does not cause pollution
All of the above
The Space Application Centre for training in Satellite Communication Technology is located at
Bangalore
Mumbai
Ahmedabad
New Delhi
A man Jumping out of a moving train is thrown
forward
backward
sideways
None of the above
A solar eclipse occurs when the earth, the sun and the moon are in a straight line, and
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
The characteristics of a musical note are
loudness
pitch
quality or timbre
All the above
The velocity of sound in air increases with
the rise of temperature
rise of its frequency
decrease in humidity
fall of temperature
To get 5 images of a single object one should have two plane mirrors inclined at an angle of
72°
60°
36°
90°
Which of the following can produce electricity?
resistor
thermocouple
light bulb
neon tube
The audible range of a normal human ear is frequencies ranging from
10000 to 20000 Hz
50 to 15000 Hz
20 to 20000 Hz
15 to 50000 Hz
The earth's nearest neighbour in space is
the Sun
the Moon
the Venus
the Mars
Some persons are not able to see distant objects clearly because the image of the object is focused in front of the retina. This defect is known as
short sight
long sight
astigmatism
presbyopia
A hydraulic brake in an automobile uses
a fluid to transmit the braking force
the force applied by the driver
hydrogen gas and not any liquid
a vacuum brake
Compared to the atomic bomb, the destructive power of a hydrogen bomb is
greater
less
equal
can't be determined
Fish and other aquatic creatures can live inside a deep frozen pond because
fish are cold-blooded animals
ice is a bad conductor of heat
there will always be water just beneath the ice level
they can adapt themselves to live in ice
When light travels from one medium to another there is a change in its
velocity
wavelength
frequency
Both (a) and (b) above
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
Light from the sun reaches the earth in
2 minutes
4 minutes
12 minutes
8 minutes
The radius of an atom is approximately
10-10 cm
10-12 cm
10-13 cm
10-16 cm
The distance between two bodies is halved. Now the force of attraction between them will be
half
one fourth
four times
two times
When a whistling engine approaches a person standing on the platform, the frequency or the note
appears to increase
appears to decrease
does not change at all
first increases then decreases
When an incident beam of light strikes the surface of a glass slab normally, the refracted beam
goes straight through without bending
gets deviated away from the normal
gets bent towards the normal
gets reflected
The number of galaxies that are visible without telescope on clear dark nights and away from bright lights is
one
two
three
infinite
For detecting and, testing of small electric charges we use
an electrophorus
an electroscope
an electromagnet
an ammeter
When a bullet is fired from a gun
the gun moves forward
the gun jumps up
the gun does not move
the gun recoils with the same momentum as the bullet
Nuclear fission process means
absorption of a neutron by a nucleus
breakup of the nucleus of a heavy atom into two nearly equal halves emitting two or three neutrons and releasing large amounts of nuclear energy in the process
the scattering of neutrons
formation of heavier nucleus
Photocells are used
in burglar alarms
in automotive devices for light switches
television cameras
All the above
If an object is placed between two parallel plane mirrors, the number of images formed will be
1
infinite
0
4
Body A is kept in contact with body B. Heat will flow from A to B if
the heat content of A is greater than that of B
the temperature of A is greater than that of B
the specific heat of A is greater than that of B
the specific heat of B is greater than that of A
The focal length or lens or the eye is under the control or the
iris
pupil
ciliary body
cornea