Fig. shows an electronic voltage regulator. The zener diode may be assumed to require a minimum current of 25 mA for satisfactory operation. The value of R required for satisfactory operation is ohm.

Fig. shows an electronic voltage regulator. The zener diode may be ass

1.	Fig. shows an electronic voltage regulator. The zener diode may be assumed to require a minimum current of 25 mA for satisfactory operation. The value of R required for satisfactory operation is ohm.
A.	80
B.	40
C.	20
D.	None of these
Answer» B. 40

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Fig. shows an electronic voltage regulator. The zener diode may be assumed to require a minimum current of 25 mA for satisfactory operation. The value of R required for satisfactory operation is ohm.

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