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  • (a) Plot V-I characteristics for an illuminated photodiode under reverse bias for three different illumination intensities  . (b) In a zen

(a) Plot V-I characteristics for an illuminated photodiode under reverse bias for three different illumination intensities I_1>I_2>I_3
.
(b) In a zener regulated power supply, a zener diode with Vz = 6 V is used for regulation. The load current should be 4·0 mA and zener current is five times the load current for unregulated input of 10 V. Find the series resistor Rs used in the power supply.

 

 
 
 
 
 

Answers (1)

a)

b)

\\I=I_z+I_L\\given\ I_z=5I_L\\therefore\\I=6I_L=24mA\\\frac{V_{input}-V_z}{R}=I\\\\24mA=\frac{10-6}{R}\\\\R=166.67\Omega

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