1.

In a regulated power supply, two similar 15 V zeners are connected in series. The input voltage is 45 V d.c. If each Zener has a maximum current rating of 300 mA, what should be the value of the series resistance?

A. 10 Ω
B. 50 Ω
C. 25 Ω
D. 40 Ω
Answer» C. 25 ≈í¬©


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