p-n Junction — Temperature DependenceHardQuestion 20260
Question
The reverse saturation current I₀ of a p-n junction doubles approximately for every:
- A1°C rise
- B5°C rise
- C10°C riseCorrect
- D20°C rise
Correct answer
10°C rise
Explanation
I₀ depends on minority carrier concentration which depends exponentially on temperature. Rule of thumb: I₀ approximately doubles for every 10°C rise in temperature. This leads to thermal runaway in BJT circuits if not properly stabilised.