Regulated Power Supplies » Exercise – 1
33. 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 series resistance ?
(a) 10 Ω
(b) 50 Ω
(c) 25 Ω
(d) 40 Ω
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