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Assistant General Science

Physics – 08

തെർമോ മീറ്ററുകൾ, താപ പ്രസരണം തുടങ്ങിയ ഭാഗങ്ങളിൽ നിന്നുള്ള ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ.

  • Thermometer was invented by

Galileo

 

  • Mercury thermometer was invented by

Fahrenheit

 

  • Clinical Thermometer was invented by

Thomas Albutt

 

  • Range of Clinical Thermometer is

-35°C to 42°C

 

  • Normal human body temperature is

36.9°C (98.4°F or 310K)

 

  • Thermometer used to measure temperature very near to absolute zero

Magnetic Temperature

 

  • Magnetic Thermometer works on the basis of

Curies Law

 

  • Thermometer in which temperature is calculated from the resistance of a coil

Resistance Thermometer

 

  • Thermometer used to measure high temperature

Pyrometer

 

  • Thermometer used to measure very low temperature

Cryometer

 

  • What are the methods of heat transmission

Conduction, Convection, Radiation

 

  • Process of exchange of hotter particles to the neighbouring colder particles is known as

Conduction

 

  • Heat transmission mode in which energy transmitted by direct contact

Conduction

 

  • Transfer of heat in a fluid with the help of heated particles from a hotter region to a colder region is called

Convection

 

  • Sea and land breezes can be explained on the basis of

Convection

 

  • Ocean currents, Monsoons, and Tradewinds are based on

Convection

 

  • Transfer of heat from one point to another without heating the medium is called

Radiation

 

  • Solar energy reaches Earth through

Radiation

 

  • The main source of our energy

Sun

 

  • Transfer of heat from one point to another without heating the medium is called

Radiation

 

  • Heat loss through conduction and convection in Thermos flasks prevents by

Vacuum

 

  • Heat loss through Radiation in Thermos flasks prevents by

Polished shining surface

 

  • Glass used to make Thermos flasks

Borosilicate glass

 

  • The temperature at which water has least volume and high density

4°C

 

  • The property of decreasing volume of a liquid by increasing the temperature from 0 to 4 degree and increasing volume after that

Anomalous expansion

 

  • On freezing the volume of water

Increasing

 

  • The tendency of matter to change in volume in response to change in temperature is called

Thermal Expansion

 

  • Mercury thermometer works on the principle of

Thermal Expansion

 

  • The substance which expands more on heating

Gases

 

  • The substance which expands less on heating

Solids

 

  • Property of a material to conduct heat is called

Thermal conductivity

 

  • Unit of thermal conductivity

Watts per meter Kelvin

 

  • The law of heat conduction is called

Fourier’s law

 

  • Coefficient of thermal conductivity

K Factor or Thermal admittance

 

  • In refrigerator, cooling is produced by

Evaporation

 

  • Amount of water vapor present in air is called

Humidity

 

  • Perspiration is maximum when

Temperature is maximum and air is humid

 

  • Phenomenon of reducing the melting point of ice on exerted pressure is called

Regelation

 

  • Skating on ice is possible due to the phenomenon of

Regelation

 

  • Joule’s law is related to

Heat

 

  • Example of  a good conductor of heat and bad conductor of electricity

Mica

 

  • Density of a body decreases with

Rise in temperature

 

  • Fixed temperature at which solid becomes a liquid is known as

Melting point

 

  • Melting point of ice raised by the decrease of

Pressure

 

  • Fixed temperature at which a liquid boils and changes itself into vapour is called

Boiling point

 

  • Melting point of water raised by the increase of

Pressure

 

  • Melting point of Mercury

-39°C

 

  • Melting point of Alcohol

114°C

 

  • Water inside Pressure Cooker boils at

120°C


(To be Continued…)