Question

At 298 K, the nominal Zener voltage is found to be equal to 10 V. Given that the value of the temperature coefficient is 0.072 (%/K), what is the nominal Zener Voltage at 398 K?

(a) 9.46 V

(b) 9.54 V

(c) 0.54 V

(d) 10.54 V

I had been asked this question in class test.

I want to ask this question from Types of Diode and their Testing in chapter Diode Circuit of Analog Circuits

Answer 1

Correct answer is (d) 10.54 V

Explanation: The change in VZ with temperature is calculated from the following equation:

Change in VZ = TC.VZ(T1 – T0))/1000

Change in VZ = 0.54 V

Now, as the value of T is positive, new VZ = 10 + 0.54 V = 10.54 V.