Chapter 10 - Questions

Questions
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1. Spoons of different materials are used to stir a hot drink. Which of the following spoons will heat up the fastest?

A) Wooden spoon
B) Steel spoon
C) Plastic spoon
D) Glass spoon


2. When convection current is set up in a room, which one of the following does not happen?

A) Density of hot air increases
B) Cool air moves down
C) Air expands when heated
D) Hot air rises of the top


3.People sitting round an open fire feel warm because heat is transferred mainly by

A) Convection
B) Radiation
C) Freezing
D) Conduction


4. Which methods of transer of thermal energy does not require a material medium?

A) Radiation
B) Conduction
C) Convection
D) Conduction & Convection


5. In which of the following is most of the heat transferred by conduction?

A) Baking of bread in an oven
B) Heating of soldering iron
C) Boiling of water in an electric kettle
D) Deeping frying of chicken in oil