In which direction do the electrons flow in this diagram of a PV cell?
N-type silicon
P-N junction
P-type silicon
O A.
OB.
O C.
D.
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load
from the P-type silicon through the P-N junction to the N-type silicon
from the N-type silicon through the P-N junction to the P-type silicon
from the N-type silicon through the light bulb to the P-type silicon
from the P-type silicon through the light bulb to the N-type silicon