1. How should a photovoltaic cell best be classified?

A. active solar collector

B. passive solar collector

C. moderate solar collector

D. medium solar collector

2. Which substance is used in the construction of most photovoltaic cells?

A. magnesium

B. copper

C. silicon

D. chlorine

3. What is the efficiency of most current photovoltaic cells?

A. 5%

B. 20%

C. 60%

D. 80%

4. Photovoltaic cells rely on which process to transform energy?

A. gamma emission

B. alpha emission

C. radioactivity

D. photoelectric effect

5. What is the energy transformation process that occurs in an operating photovoltaic cell?

A. light → chemical energy → potential energy

B. light → electron emission → electricity

C. light → mechanical energy → sound energy

D. light → potential energy → thermal energy

6. Which type of current is produced by an operating photovoltaic cell?

A. AC only

B. DC only

C. neither AC nor DC

D. both AC and DC

7. A solar panel consists of one solar cell.

A. true

B. false

8. The unit used to measure the amount of electrical energy used is called the kilowatt.

A. true

B. false