The circuit diagram used to study the characteristic curve of a zener diode is connected to variable power supply (0 \( - \) 15 V) as shown in figure. A zener diode with maximum potential Vz = 10 V and maximum power dissipation of 0.4 W is connected across a potential divider arrangement. The value of resistance RP connected in series with the zener diode to protect it from the damage is ________________ \( \Omega \).
The circuit diagram used to study the characteristic curve of a zener diode is connected to variable power supply (0 \( - \) 15 V) as shown in figure. A zener diode with maximum potential Vz = 10 V and maximum power dissipation of 0.4 W is connected across a potential divider arrangement. The value of resistance RP connected in series with the zener diode to protect it from the damage is ________________ \( \Omega \).
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Correct Answer: 125
Solution and Explanation
Step 2: The maximum supply is 15 V and the zener holds 10 V, so the voltage across RP is 15 - 10 = 5 V.
Step 3: RP = 5/0.04 = 125 \(\Omega\).
Answer: 125
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