State the energy changes in the following cases while in use:

(a) Loudspeaker

(b) A steam engine

(c) Microphone

(d) Washing machine

(e) A glowing electric bulb

(f) Burning coal

(g) A solar cell

(h) Biogas burner

(i) An electric cell in a circuit

(j) A petrol engine of a running car

(k) An electric iron

(l) A ceiling fan

(m) An electromagnet.

Name the process used for producing electricity from nuclear energy.

Define the term potential energy of a body. Name its two forms and give one example of each.

Name the form of energy which a body may possess even when it is not in motion. Give an example to support your answer.