The only way to keep a transistor case temperature at 25°C when the ambient temperature is 25°C is
A) to keep refrigerated.
B) by keeping equipment chassis open.
C) by bringing room temperature below 21°C.
D) by fan-cooling or by using a heat sink.

Question

Quizplus · Accepted Answer

The only way to keep a transistor case temperature at 25°C when the ambient temperature is 25°C is by fan-cooling or by using a heat sink. Both of these methods allow for heat to be dissipated from the transistor, keeping its temperature at a safe level. Refrigeration is unnecessary and impractical for this purpose, keeping equipment chassis open would not provide sufficient cooling, and bringing the room temperature below 21°C would be difficult and unnecessary.

The Only Way to Keep a Transistor Case Temperature at 25°C