A 9v stabilized voltage supply is required to run a car stereo system from car 12 v battery.A zener diode with Vz = 9v and Pmax. = 0.25 W is ued as a voltage regulator as shown in figure .find the value of the series resistor.
Solution;
The figure is as below;
R can be calculated using the equation;
But;
Hence;
By direct substitution;
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Thanks a lot sir
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