Perceptibility of Static Discharge A human typically cannot feel (perceive) a static electric discharge as low as which of the following voltage levels?

Introduction / Context:
Electrostatic discharge (ESD) can damage electronic components at voltages far below the threshold of human perception. Understanding perception thresholds helps explain why unseen ESD events still harm sensitive parts.

Given Data / Assumptions:

• Human perception of a spark typically begins around 2 kV to 3 kV in normal humidity.
• Electronics can be damaged by discharges as low as a few tens to hundreds of volts.
• We are comparing options that include very low and very high voltages.

Concept / Approach:

Because people usually do not feel discharges until the voltage is in the kilovolt range, any small value like 50 V is far below the tactile threshold. Thus, while 50 V ESD can harm ICs, a person will not notice it. The question asks for a level that a human cannot feel; the smallest value offered is the clearest correct choice in that context.

Step-by-Step Solution:

Verification / Alternative check:

ESD control literature emphasizes damage at 100 V or less to MOS devices, while humans perceive only much higher voltages.

Why Other Options Are Wrong:

200 V may still be imperceptible but is higher than necessary; the best answer is the lowest value. 2000 V, 10000 V, and 50000 V are easily felt and often seen/heard.

Common Pitfalls:

Assuming that if you cannot feel ESD it cannot cause damage. Sensitive components can be harmed by imperceptible discharges.

Final Answer:

50