ICSE Class 8 Physics Question 25 of 25

Energy — Question 25

Back to all questions
25
Question

Question 25

State the energy changes in the following while in use:

(a) An electric bulb

(b) An electric oven

(c) A loudspeaker

(d) A microphone

(e) An electric motor

(f) A wind mill

Answer

(a) When an electric bulb glows, the electrical energy changes into heat and light energy.

(b) In electric oven, electrical energy changes into heat energy .

(c) In loudspeaker, electrical energy is converted into sound energy.

(d) A microphone converts sound energy into electrical energy.

(e) An electric motor converts electrical energy into mechanical energy.

(f) A wind mill converts mechanical energy into electrical energy.