Which of the following pairs is not correct?
Television - Baird
Transistor ~ Shockley
Thermometer - Celsius
Barometer Torricelli
Correct Answer :
C. Thermometer - Celsius
Related Questions
Separating particles from a suspension is effected by
centrifugal force
frictional force
gravitational force
distillation
The colour or an opaque object is due to the colour it
absorbs
refracts
reflects
scatters
The evaporation rate depends on
the nature of the liquid
area of the exposed surface of the liquid
temperature of air and of the liquid
All the above
Match the following:
| A. Manometer | 1. Depth of sea |
| B. Audiometer | 2. High temperatures |
| C. Pyrometer | 3. Level of human hearing |
| D. Fathometer | 4. Pressure of a gas |
A-1 B-4 C-3 D-2
A-4 B-3 C-1 D-2
A-4 B-3 C-2 D-1
A-3 B-4 C-1 D-2
Lightning conductors are made of
iron
chromium
copper
steel
The mixing up of two gases as a result of random motion of molecules is called
diffusion
effusion
vaporisation
sublimation
Railway tracks are banked on curves so that
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 focal length or lens or the eye is under the control or the
iris
pupil
ciliary body
cornea
A bullet is fired at a certain angle with the horizontal. Its path will be
elliptical
a straight line
a parabola
a vertical line
We see the sun before it actually rises on the horizon. This is due to
refraction
reflection
total internal reflection
parallax
Among the following the most suitable material for the core of an electro-magnet is
steel
wood
soft iron
copper
Heat transfer
cools the body that transfers it
heats the body that absorbs the heat
may change the physical state of the substance
All the above
If a bar magnet is broken into two pieces
both pieces will lose their magnetism
one piece will have North Pole on both ends and the other South Pole on its both ends
each will remain a magnet with North Pole at one end and South Pole at the other
the longer piece will behave as a bar magnet while the smaller will have no magnetism at all
A ruse wire is characterised by
high resistance and high melting point
high resistance and low melting point
low resistance and high melting point
low resistance and low melting point
Acoustics is a property or
Physics
Chemistry
Biology
Economic
Where does the centre of gravity of a rubber ring lie?
on the outer surface
in the inner surface
at the centre of the ring
None of the above
Photo-electric cells convert
electrical energy into light energy
light energy into electrical energy
light energy into heat energy
electrical energy into heat energy
The unit of heat energy is
watt
degree
joule
erg
A piece of ice is Boating In water kept in a beaker. When all the ice melts the level of water will
first rise and then fall
fall
remain the same
rise
In the nucleus of an atom, the uncharged particle is
proton
neutron
electron
positron
No current will flow between two charged bodies if they have the same
resistance
charge
potential
charge/potential ratio
An ohm is a unit of
potential difference
resistance
current
All the above
If the speed of the rotation of the earth increases the weight of a body
will increase
will decrease
will have no change
will either increase or decrease
The brightest planet in the Solar System is
Jupiter
Mercury
Venus
Sirius
The transistor was invented by
Marconi
Baird
John Bardeen, Walter H. Brattain and William Shockley
Edison
The instrument used to determine the RD (Relative Density) of a liquid by the principle of floatation is
Hygrometer
Hypsometer
Hydrometer
Densimeter
Air pressure is usually highest when the air is
warm and moist
cool and dry
warm and dry
cool and moist
Increase in pressure
has no effect on the boiling point of a liquid
raises the boiling point of a liquid
lowers the boiling point of a liquid
increases the volume of a liquid
Commonly used safety fuse wire is made of
Tin
Lead
Nickel
An alloy of tin and lead
The filament lamp is an example for
fluorescence
incandescence
both (a) and (b)
None of these