1. Which of the following shows the transformation of electrical
energy into mechanical?
a. Switching on the electric fan
b. Cooking rice over a gas stove
c. Boys during PE time
d. Mining and burning coal in power station
2. Which of the following is a by-product of energy
transformation?
a. Heat
b. Light
c. Sound
d. Electricity
3. Is transformation of energy important? Why?
a. No, it useless and bad
b. No, it is waste of energy
c. Yes, it can help people in many ways
d. Yes, it produces bad effects to people
4. When does a form of energy become useful to us?
a. When it is a conserved or saved
b. When it is stored in chemical energy
c. When it is changed into another form
d. When it is released into the atmosphere
a. It travels by waves.
5. How is heat transformed?
b. It travels only through a medium.
c. It travels from a body having low to high temperature.
d. It travels from a body with high to lower temperature.
6. Which of the following is one of the benefits people can get
from heat being transformed into electrical energy?
a. cooking food
b. pumping a well
c.generates electricity
d.sweeping the floor
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