Explain how zener diode maintains constant voltage across the load
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Explanation of how the Zener diode maintains a constant voltage across the load :
- Zener diode has the property of behaving sort of a DC battery in an 'on' state.
- If the Zener diode is shunted across the load RL and also the voltage across the Zener diode is over the Zener voltage VZ.
- Then the Zener diode is in an 'on' state, and any variation in voltage across the Zener diode because of variations either in providing voltage or in load resistance isn't ready to modify the output voltage.
- This Zener diode maintains the voltage constant or static across the load.
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