Electric companies use thermal imaging camera to identify

  • the resistivity of a wire
  • the resistivity of a resistor
  • overheating of wires and power lines
  • the heat released by electrical appliance

At night, the convection current of land and sea

  • remains same
  • stops
  • is reversed
  • is converted to radiation current

When heating element from cooker is turned out, at first it emits

  • heat energy
  • gamma rays
  • infrared waves
  • radio waves

Heat is a form of

  • energy
  • force
  • power
  • resistance

Sun emits

  • low ultraviolet rays
  • high ultraviolet rays
  • low infrared waves
  • high infrared waves

An instrument that measures how much hot or cold an object is, is known as

  • barometer
  • thermometer
  • galvanometer
  • ohm-meter

For transferring of heat, conduction and convection need a

  • vacuum
  • space
  • sphere
  • medium

The inner two walls of the flask are made of

  • steel
  • metalloid
  • glass
  • metal

Poor conductor of heat is called

  • electrical insulator
  • electrical conductor
  • thermal conductor
  • thermal insulator

Heat doesn't flow through

  • wind
  • air
  • vacuum
  • energy

In medicine thermograph is used to

  • identify bacteria
  • identify infected tissues
  • kill infected cells
  • identify damaged parts of an organ

The photographs taken by the device "Thermograph" are known as

  • thermal photos
  • heat graphical pictures
  • thermograms
  • all of above

The excessive loss of heat is also harmful for

  • environment
  • surroundings
  • trees and forests
  • glaciers

Global warming causes

  • extreme weather and climate changes
  • extreme cold in summer
  • skin cancers
  • skin burns

If we melt magnesium, it would start to give

  • yellow glow
  • white light
  • orange glow
  • blue shine

A lot of heat turns the color of a metal

  • yellow
  • orange
  • red
  • blue

A device that uses special film to photograph heat is known as

  • Thermal goggles
  • Thermal recording camera
  • Thermal imaging camera
  • Thermal hotspot goggles

Sunrays warm up the

  • land before the sea
  • sea before the land
  • land and sea at the same time
  • land but not sea

The number of walls of a thermos is

  • 1
  • 2
  • 3
  • 4

The name of the scientist who invented thermos is

  • John Dalton
  • James Dewar
  • John Edison
  • James Blake

Global warming effects

  • forests around the globe
  • temperature of the globe
  • wind and moisture of the globe
  • water around the globe

The device captures heat by

  • radio waves
  • Infrared radiations
  • gamma radiations
  • ultraviolet radiations

The transfer of thermal energy without any medium is known as

  • conduction
  • convection
  • radiation
  • vibration

We can see sunlight because

  • light can pass through air
  • light can pass through opaque solids
  • light can pass through vacuum
  • light travels in straight line

When air on the land is warm, the air on the sea is

  • also warm
  • cool
  • normal
  • both b and c

The faster the particles vibration,

  • the more the frequency of waves
  • the more the amplitude of waves
  • the more the wavelength of waves
  • the lesser the amplitude of waves

The energy of sun, soil and plants is

  • escaped from greenhouse
  • trapped in greenhouse
  • converted to light energy
  • converted to nitrate

The waves that are formed by vibration of hot particles, are known as

  • radio waves
  • micro waves
  • infrared waves
  • gamma rays

Color and texture that is the best absorbate of radiant heat is

  • black and shiny
  • white and shiny
  • black and dull
  • white and dull

Thermal energy travels in

  • one way
  • two ways
  • three ways
  • four ways
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