Question

at 25 degree the zener voltage was observed to be 12 V. if the temperature co efficient is 0.01%/C . what is the value of zener voltage Vz at 200 degree C​

Answer 1

Explanation:

Due to the positive temperature coefficient of zener diode, the increase in voltage of zener diode due to increase in temperature =V0αΔθ

=7.2×0.0007×25V=0.13V

Hence, the zener voltage at temperature 45∘ is 7.2V+0.13V=7.33V

I hope it will help you thank you ❤️

Answer 2

Answer:

The value of the Zener voltage is 12.21 V.

Explanation:

• A Zener diode is a particular kind of diode made to consistently permit current to flow "backwards" when a specific reverse voltage, called the Zener voltage, is attained.
• There is a wide range of Zener voltages used in the fabrication of Zener diodes, some of which are even changeable.
• A Zener diode has a positive temperature coefficient over 5 V, meaning that the voltage inside the device rises as the temperature does.
• It has a negative temperature coefficient below 5 V; as the temperature rises, Zener voltage falls.
• Increase in the voltage of the Zener diode = V0αΔθ = 12*0.0001*(200-25) = 0.21V
• The value of the zener voltage = 12+0.21 = 12.21 V

The value of the zener voltage is 12.21V.

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