Physics
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.
Answer
(a) Electrical energy changes into sound energy
(b) Heat energy changes into mechanical energy
(c) Sound energy changes into electrical energy
(d) Electrical energy changes into mechanical energy
(e) Electrical energy changes into light energy
(f) Chemical energy changes into heat energy
(g) Light energy changes into electrical energy
(h) Chemical energy changes into heat energy
(i) Chemical energy changes into electrical energy
(j) Chemical energy changes into mechanical energy
(k) Electrical energy changes into heat energy
(l) Electrical energy changes into mechanical energy
(m) Electrical energy changes into magnetic energy
Related Questions
Name the form of mechanical energy, which is put to use.
Energy can exist in several forms and may change from one form to another. For each of the following, state the energy changes that occur in:
(a) the unwinding of a watch spring
(b) a loaded truck when started and set in motion
(c) a car going uphill
(d) photosynthesis in green leaves
(e) charging of a battery
(f) respiration
(g) burning of a match stick
(h) explosion of crackers
Name the process used for producing electricity from nuclear energy.
Is it practically possible to convert a form of energy completely into the other useful form? Explain your answer.