Question

A car stereo working at stabilized voltage supply of 9 v DC and has a zener diode of 9V, 0.25W. But the voltage supply inside the car is 12V DC.

1. Which mode of bias will you suggest to connect zener diode voltage regulator?

2. Draw a circuit diagram of voltage regulation to help the boy.

3. Which device is essential for circuit diagram? Find the value of that device.

Answer 1

1. Reversebias

2. 

3. Resistance: R can be calculated using the equation

V_s = IR + V_z, 12 = \(\Big(\frac{0.25}{9}\Big)\)R+ 9, R = 108 Ω.