Diodes and Applications

What is the current through the zener diode?

A 0 mA

B 7 mA

C 8.3 mA

D 13 mA

ANS:B - 7 mA

Voltage Source (Vs) = 13V.
The voltage of Zener (Vz) = 6V.

I = (Vs - Vz)/R.
I = (13 - 6)/1,
I = 7 mA.

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