Q:      A zener diode in which nominal voltage is 10V at 10mA has an incremental resistance of 50W.  hat voltage Ahmad Tulaib should expect if Bilal disturb the settings to half the diode current. What is the  Vzo of the zener model.

Solution:

When the current is altered by -5mA, then the value of voltage

                                                        Vz=10 - rzIz=10-5(0.05)=9.75V

When the current is doubled that is increased by 10mA, then

                                                          Vz=10+10(0.05)=10.5V

Vzois the intercept of the tangent to characteristic at (10V,10mA) is the voltage alteration , when the current decreases through 10mA, thus

                                                            Vzo=10-10(0.05)=9.5V

Vzois the intercept of the tangent to characteristic at (10V,10mA) is the voltage alteration , when the current decreases through 10mA, thus

                                                            Vzo=10-10(0.05)=9.5V