cosmicdragon324
Answered

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23 When the electric fan is on and revolving, what energy changes are shown?
A Heat to electrical
C. Electrical to mechanical
B. Mechanical to heat
D. Chemical to electrical

24. Which does NOT tell the importance of electrical energy?
A. It makes work faster and easier
B. It gives the body energy to work.
C. It lights homes, offices and schools
D. It runs appliances and other gadgets.

25. Which energy transformation happens when you switch on the flashlight?
A. Light and heat energy ➯ electrical energy ➯ chemical energy
B. Light and heat energy ➯ chemical energy ➯ electrical energy
C. Chemical energy ➯ electrical energy ➯ light and heat energy
D. Electrical energy ➯ chemical energy ➯ light and heat energy une

26. Why is it necessary that energy from nature be converted into electricity?
A. Nature is the only source of energy.
B. Electricity is safer to use than nature.
C Electricity can be converted in one area only.
D. Electricity can be stored, distributed, and transmitted to far places

27. What can you infer when you switch on your rice cooker and the electrical energy is changed into heat energy?
A. Energy can be wasted.
C. Energy can be changed.
B. Energy can be created.
D. Energy can be changed.

28. In which situation can we find electrical energy transformed into sound energy and heat energy?
A. When you ride a tricycle
B. When you switch on your flat iron
C. When you switch the electric fan on
D. When you watch a movie on the television for a long period.

29. Which is the main source of energy on earth?
A. Sun
B. Water
C. Plants
D. Animals

30. Which of the following electrical devices transforms electrical energy into sound energy?
A. Stereo
B. Flash light
C. Refrigerator
D. Microwave oven​

Sagot :

FretzyCayanong

Right Answer:

23 When the electric fan is on and revolving, what energy changes are shown?

A Heat to electrical

C. Electrical to mechanical

B. Mechanical to heat

D. Chemical to electrical

24. Which does NOT tell the importance of electrical energy?

A. It makes work faster and easier

B. It gives the body energy to work.

C. It lights homes, offices and schools

D. It runs appliances and other gadgets.

25. Which energy transformation happens when you switch on the flashlight?

A. Light and heat energy ➯ electrical energy ➯ chemical energy

B. Light and heat energy ➯ chemical energy ➯ electrical energy

C. Chemical energy ➯ electrical energy ➯ light and heat energy

D. Electrical energy ➯ chemical energy ➯ light and heat energy une

26. Why is it necessary that energy from nature be converted into electricity?

A. Nature is the only source of energy.

B. Electricity is safer to use than nature.

C Electricity can be converted in one area only.

D. Electricity can be stored, distributed, and transmitted to far places

27. What can you infer when you switch on your rice cooker and the electrical energy is changed into heat energy?

A. Energy can be wasted.

C. Energy can be changed.

B. Energy can be created.

D. Energy can be changed.

28. In which situation can we find electrical energy transformed into sound energy and heat energy?

A. When you ride a tricycle

B. When you switch on your flat iron

C. When you switch the electric fan on

D. When you watch a movie on the television for a long period.

29. Which is the main source of energy on earth?

A. Sun

B. Water

C. Plants

D. Animals

30. Which of the following electrical devices transforms electrical energy into sound energy?

A. Stereo

B. Flash light

C. Refrigerator

D. Microwave oven

@FretzyCayanong

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