experiment no.3

we had to build a circuit on a breadboard using the following components, 2 100ohms resisters, 1  5V, 1 400mw zen er diode (ZD)

R = 100 OHMS AND RL = 100OHMS VS = 12V
We then had to work out the value of vz which is 5v

when we vary the VS from 10 to 15vs the value of the VZ is almost the same

• At 10vs the voltage drop is 4.2v and at 15vs the VD was 4.6 

• this kind of circuit is used to vloatge regulate voltage, z diode  to keep the voltage stabile.