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Forward Characteristic of Zener diode
Connect the circuit demonstrated in fig (a) using the 5.1 V zener diode. For forward characteristic, reverse the connection of zener diode. Switch on the variable dc power supply. Observe and record voltage across the diode for different values of currents say, 1 mA, 10 mA and 30 mA. Current can be varied by varying the power supply voltage. Observe and record corresponding voltage too. It must be evident that forward characteristic is similar to that of a junction rectifier diode as illustrated in below fig.(b).
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