An unloaded zener regulator has a
source voltage of 24 V, a series resistance of
470 V, and a zener voltage of 15 V. What is the
zener current?
1
Expert's answer
2020-08-24T12:24:22-0400
If zener voltage is 15 V, then the resistor voltage is "U=24-15=9V." The zener and the resistor are connected in series, so their currents are equal. The resistor current: "I=U\/R=9\/470\\approx0.02 A=20mA". So, the zener current is also 20 mA.
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