Question

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) bio-gas burner

(i) an electric cell in a circuit

(j) a petrol engine of a running car

(k) an electric toaster

(l) a photovoltaic cell

(m) an electromagnet.

Answer 1

(a) Electrical energy to sound energy

(b) Chemical energy to mechanical energy

(c) Sound energy into electrical energy

(d) Electrical energy to mechanical energy

(e) Electrical energy to heat and light energy

(f) Chemical energy to heat energy

(g) Solar energy to electrical energy

(h) Chemical energy to heat energy

(i) Chemical energy to electrical energy

(j) Chemical energy to mechanical energy

(k) Electrical energy to heat energy

(l) Light energy to electrical energy

(m) Electrical energy to magnetic energy