The efficiency of today’s best solar cell is about ___________
A. 15-20%
B. 40%
C. 50%
D. 75%
Answer:B
The efficiency of today’s best solar cell is about ___________
A. 15-20% B. 40% C. 50% D. 75%
Explanation: The efficiency of today’s best solar cells is about 40%. A solar cell or