Heat

Heat always flows-
1. from a colder object to a hotter object
2. from a hotter object to a colder object
3. in both the directions
4. heat never flows from one object to other
Conduction is the method of transfer of heat in
1. liquids
2. solids
3. gases
4. vacuum
Heat from the sun reaches to us by
1. radiation
2. conduction
3. convection
4. all of these
Temperature is the measure of ______of an object.
1. coldness
2. heat
3. heatness
4. hotness
Wool is _____________ conductor of heat.
1. good
2. bad
3. normal
4. neutral
In coastal areas, cold air flows in the day from sea to land. It is called-
1. land breeze
2. sea breeze
3. day breeze
4. night breeze
In which method of transfer of heat no medium is required?
1. conduction
2. convection
3. radiation
4. all of these
What is the method of transfer of heat in most of the solids?
1. convection
2. radiation
3. flaming
4. conduction
An iron ball at 40C is dropped in a mug containing water at 40C. The heat will
1. flow from iron ball to water
2. not flow from iron ball to water or from water to iron ball
3. flow from water to iron ball
4. increase the temperature of both
A wooden spoon is dipped in a cup of ice cream. Its other end
1. becomes cold by the process of conduction
2. becomes cold by the process of convection
3. becomes cold by the process of radiation
4. does not become cold