A Zener diode having break down voltage Vz = 6 V is used in a voltage regulator circuit as shown in the figure. The minimum current required to pass through the Zener to act as a voltage regulator is

Question

A Zener diode having break down voltage $Vz = 6 V$ is used in a voltage regulator circuit as shown in the figure. The minimum current required to pass through the Zener to act as a voltage regulator is $10 mA$ and maximum allowed current through Zener is $40 mA$ . The maximum value of $R_{s}$ for Zener to act as a voltage regulator is

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Answer:

B

Solution:

Minimum current $= 10 mA (I_{L} = 0)$ $R_{S} = \frac{V}{l} = \frac{4 V}{10 mA} = 400Ω$

TestHub · Accepted Answer

Minimum current = 10 mA ( I L ​ = 0 ) R S ​ = l V ​ = 10 mA 4 V ​ = 400Ω

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