A 10 V source feeds a 5 V ideal Zener through 250 Ω. Minimum Zener current for regulation is 5 mA. Maximum load current is:
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A 10 V source feeds a 5 V ideal Zener through 250 Ω. Minimum Zener current for regulation is 5 mA. Maximum load current is:

G1 Physics · Accepted Answer

I_S=(10−5)/250=20 mA. Hence I_L,max=20−5=15 mA.