【单选题】{ In a half-wave rectifier circuit, for a typical real silicon diode (not ideal diode) at room temperature, the output voltage is less than the source voltage. This is because ( ). }
A.
There is no voltage drop across the diode.
B.
There is a voltage drop (approximately 0.7V) across the diode.
C.
The diode is in the reverse-bias region.
D.
There is a voltage drop (approximately 6V) across the diode.
【单选题】If one silicon diode and one germanium diode are connected in series, the voltage drop across the combination of the two diodes will be equal to __________.
A.
the forward drop equal to that of the silicon diode
B.
the forward drop equal to that of the germanium diode
C.
the forward drop equal to that of the sum of the voltage drops across the two diodes
D.
the forward drop equal to that of the difference of the voltage drops across the two diodes