An ohmmeter reads a very low resistance (approx 0,Omega) across both junctions of a BJT regardless of probe polarity. This indicates the transistor is:

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Electronics Engineering QUESTION #11692

Question 1

An ohmmeter reads a very low resistance ($\approx 0\,\Omega$) across both junctions of a BJT regardless of probe polarity. This indicates the transistor is:

Operating normally in saturation
Open-circuited internally
Short-circuited (damaged) between junctions✔️
A PNP type requiring reverse probing

Correct Answer Explanation

A healthy BJT should show a diode-like forward voltage (~0.6 V) in one direction and near-infinite resistance in reverse for each junction. A reading of near-zero resistance in both directions for a junction indicates an internal short circuit — the device is damaged and must be replaced.

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