Analog Electronics - Engineering

Q1:

Figure is a 24 Vr stabilized power supply. The zener is 24 V, 600 mW. The minimum zener current is 10 mA. Proper values R and maximum load current are

A 320 Ω, 10 mA

B 400 Ω, 15 mA

C 400 Ω, 10 mA

D 320 Ω, 15 mA

ANS:D - 320 Ω, 15 mA

Max. zener current = . Maximum load current = 25 - 10 = 15 mA.