From the circuit shown below, the maximum and minimum values of zener diode current are
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a
6mA, 5mA
b
14mA, 5mA
c
9 mA, 1mA
d
3mA, 2mA
answer is C.
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Detailed Solution
maximum voltage across 5 KΩ resistance is 70 V and constant load current is 5010×103=5mA and total current 705×103=14 mA ; so maximum Zenner current is 9 mA similarly mimimum voltage across 5 KΩ resistance is 30 V and minimum current is 305×10-3=6 mA so minimum Zenner current is 1 mA