34. State the energy changes in the following whi.
in use.
(a) An electric bulb
(b) An electric oven
(d) A microphone
(c) A loud speaker
(e) An electric motor
Answers
Answer and Explanation:
a) Since bulb produces light. Hence, electric bulb changes;
Electrical energy →heat energy( it heated the tungsten)→
light energy
b) Since electric oven heat our food material. Hence, electric oven changes,
Electrical energy →heat energy
c) Since loud speaker transmit sound. Hence, loud speaker changes,
Electrical energy → Kinetic energy(vibrates the air) →
Sound energy
d) Since microphone transmit our sound. Hence, microphone changes,
Sound energy → Kinetic energy(vibrate the inside plate)
→ Electrical Energy
e) Since electric motor performs various kinda work. Hence, electric motor changes,
Electrical energy → Kinetic energy(rotation of rotor) →
Mechanical Energy
That's all.
Answer:
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