Question

There are two transistors A and B having ‘S’ as 25 and 250 respectively, on comparing the value of S, we can say B is more stable than A.

(a) True

(b) False

This question was addressed to me during an online exam.

I'd like to ask this question from Bias Stability topic in section Transistor Biasing and Thermal Stabilization of Electronic Devices & Circuits

Answer 1

Correct choice is (b) False

Explanation: More the value of S, lesser the stability, since A has lesser S value the change in beta does not affect much on the collector current. When S is high, even if IB changes by a small value, the IC current will drastically vary. Hence stability factor must possess lesser value for the proper working of a transistor.