resistance R F = (ii) knee voltage = (iii) The breakdown voltage of the Zener diode V Z = ----V XII- - ) XII- - ) - - - - PRACTICAL RESULT The V-I characteristics of the Zener diode are studied. (i) Forward resistance R F = (ii) knee voltage = (iii) The breakdown voltage of the Zener diode V Z = ----V Practical Tips • The DC power supply voltage should to be increased only up to the specified range in the forward ( – V) and reverse ( – V) directions. • The voltage applied beyond this limit may damage the resistor or the diode. • Zener diode functions like an ordinary PN junction diode in the forward direction.
Hence the forward characteristic is the same for both PN junction diode and Zener diode. Therefore, knee voltage and forward resistance can be determined as explained in the previous experiment. • Unlike ordinary PN junction diode, the reverse current in Zener diode is measured using milli-ammeter due to the large flow of current. XII- - ) XII- - ) - - - - PRACTICAL