• Pyrometer or Radiation thermometer is an instrument used
for measuring:
Ans: High temperature
• The liquid which conducts electricity but does
not undergo electrolysis is:
Ans: Mercury
• Spherical surface's curvature is measured by:
Ans: Spherometer
• Nuclear sizes are expressed
in a unit named:
Ans: Fermi
• The most of the mass of rotating wheels are concentrated
at the rim inorder to:
Ans: increase the moment of inertia
• Stars which appear single to the naked eye but are double when
seen through a telescope are:
Ans: Binary star
• The prolonging of
sound due to reflection is called:
Ans: Reverberation
• In an Electric
motor, Electrical energy is mainly converted to:
Ans: Mechanical energy
• Ozone quantity is
measured by the unit of:
Ans: Dobson
• The gas used in Refrigerator is:
Ans: Freon
• A Thermos Flask is
polished well to:
Ans: reflect all
radiation from outside
• Parsec is the unit
of:
Ans: distance
• We cannot lift up a
chair while sitting on it. The reason for this is:
Ans: Internal force acts
against gravitational force
• Skating on ice is
possible due to:
Ans: Regelation
• The temperature at
which water has least volume and high density:
Ans: 4° C
• The particles with
high energy photons are called:
Ans: Gamma Rays
• The brick quickly
absorbs water. The reason for this is:
Ans: Capillarity
• Device used for
recording sound under water:
Ans: Hydrophone
• The heat of
Sunlight is due to:
Ans: Infrared rays
• Lens used in car
head light:
Ans: Concave lens
• As we go up in the
atmosphere, the temperature:
Ans: decreases
• The red colour in rainbow is seen at an angle
of:
Ans: 42.8 degree
• Name the scientist
who discovered that sunlight consists of seven colours.
Ans: Isaac Newton
• The arm of a
spanner is made longer to:
Ans: increase the torque
• For getting maximum
horizontal range the projectile should project with an angle of projection:
Ans: 45° c
• The value of escape
velocity of moon is:
Ans: 2.38 kmis
• In nuclear fission
which sub-atomic particle is used to start the fission reaction?
Ans: Neutron
• Combining three
primary colours Red, Blue and Green, we get:
Ans: white
• Name the device
used to measure the humidity.
Ans: Hygrometer
• Temperature which
shows same measurement in Farenheit and kelvin scale:
Ans: 574.25
• One calorie is
equal to:
Ans: 4.2 Joules
• Photoelectric
effect was discovered by:
Ans: Henrich Hertz
• Photo electric
effect was explained by:
Ans: Albert Einstein
• The line used to
define the boundary between the earth's atmosphere and outer space is:
Ans: Karman line
• The first Asian
Country to launch space craft to Mars:
Ans: India
• Lightning conductor
was discovered by:
Ans: Benjamin Franklin
• The biggest
satellite of Saturn:
Ans: Titan
• Titan was
discovered by:
Ans: Christiaan Huygens
• We feel cool under
fan while sweating. Why?
Ans: Because evaporation
produces cooling of liquid
• The tank appears
shallow than its actual depth due to:
Ans: Refraction
• The frequency of
household electric current in India is:
Ans: 50 Hertz
• Voltage of
electricity supplied for household use in India:
Ans: 220-230 volt
• What is the boiling
point of water in Rankine scale ?
Ans: 671.641 R
• In the Romer scale
of temperature, what is the freezing point of water ?
Ans: 7.5 degree
• What is the boiling
point of water in Romer scale ?
Ans: 60 degree
• What is the working
principle of radiator in a motor car ?
Ans: Principle of
convection
• The process of heat
transmission in the form of electromagnetic waves is called ____.
Ans: Radiation
• Which type of
thermometer is used to measure human body temperature?
Ans: Clinical
thermometer
• The clinical
thermometer measures temperature in _____.
Ans: Degree Fahrenheit
(F)
• Who was the first
to develop thermometer?
Ans: Galileo. Galilei
0 Comments