The video tutorial discusses various sources of heat, including the sun, combustion, friction, and electricity. It explains how each source generates heat and provides examples, such as the sun's warmth, burning fuels, rubbing surfaces, and electric appliances. The video concludes with a call to subscribe for more educational content.

Which of the following is NOT a source of heat mentioned in the video?

• Combustion

• Wind

• Sun

• Electricity

What does the sun provide us besides light?

• Water

• Wind

• Heat

• Electricity

Which of the following fuels is NOT mentioned as a source of heat energy?

• Coal

• Natural Gas

• Kerosene

• Wood

In our homes, what is one common use of heat energy?

• Cooling food

• Heating water

• Cooking food

• Generating electricity

How was fire traditionally started using friction?

• By rubbing two stones together

• By using a lighter

• By using a magnifying glass

• By striking a match

Which household appliance works on the principle of heat generated by electric current?

• Microwave

• Iron box

• Fan

• Refrigerator