The fill factor (the ratio of the maximum useful power to the ideal power) for a silicon cell may vary from
A.0.1 to 0.15
B.0.2 to 0.3
C.0.35 to 0.5
D.0.65 to 0.8
A.0.1 to 0.15
B.0.2 to 0.3
C.0.35 to 0.5
D.0.65 to 0.8
A.higher cycle efficiency
B.lower cycle efficiency
C.same cycle efficiency
D.none of the above
A.gravitational attraction between the earth and moon
B.interaction of winds with the surface of oceans
C.absorption of solar radiation in the atmosphere
D.ratation of the earth about its axis and its motion around the sun
A.this gives a large surface area to mass ratio
B.this gives a small surface area to mass ratio
C.this increases their specific heat
D.the economical cost of the rocks is decreased
A.200
B.12000
C.3.3
D.1200
A.increases steadily
B.decreases steadily
C.first increases and then decreases
D.first decreases and then increases
A.20?C
B.60?C
C.?15?C
D.4?C
A.(?P/?T)H
B.(?P/?H)T
C.(?T/?P)H
D.(?H/?T)P