67. Transistor Reliability

Question.6

In a circuit where a BJT transistor is used to switch a load.
The load behaviour is incorrect, and when you measure the transistor with a multimeter, the base and emitter appear shorted, even with no control signal applied.

What is the most practical and likely cause of this failure?

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The BJT was damaged by excessive base current or reverse voltage
The BJT has a very high gain (hFE)
The load resistance is too low
The transistor marking is incorrect

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