Electronics - Voltage and Current

Exercise :: Voltage and Current - General Questions

16. 

Which voltage source converts chemical energy to electrical energy?

A. Electrical generator
B. Battery
C. Solar cell
D. Electronic power supply

Answer: Option B

Explanation:

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17. 

An example of potential energy is:

A. tea-kettle steam
B. a moving vehicle
C. the sun
D. a battery

Answer: Option D

Explanation:

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18. 

If 40 C of charge flow past a point in 20 s, what is the current?

A. 2 A
B. 0.5 A
C. 20 A
D. 40 A

Answer: Option A

Explanation:

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19. 

Batteries differ from fuel cells in that

A. a battery is a closed system
B. a battery uses hydrogen and oxygen to create electricity
C. a battery uses a polymer electrolyte membrane
D. none of the above

Answer: Option A

Explanation:

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20. 

The removal of a non-neutral subatomic particle converts the atom into a:

A. charged ion
B. nucleus
C. heavier element
D. compound

Answer: Option A

Explanation:

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