Question

of the following choices, which action could cause the most permanent physical harm to you?
○ force-ejecting a stuck dvd disc using a straightened paper clip.
○ using a computer without a surge protector.
○ wearing a grounding strap while installing a modem.
○ looking into the end of a fiber optic cable.
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Explanation:

To determine which action causes the most permanent physical harm, we analyze each option:

• Option 1 (Forcing - ejecting a stuck DVD...): Using a paper clip to force - eject a DVD may damage the drive but is unlikely to cause severe permanent physical harm to a person.
• Option 2 (Using a computer without a surge protector): This risks damage to the computer from power surges but does not directly cause physical harm to a person.
• Option 3 (Wearing a grounding strap...): A grounding strap is used for electrostatic discharge (ESD) protection, which is a safety measure and does not cause harm.
• Option 4 (Looking into the end of a fiber optic cable): Fiber optic cables can emit intense light (especially if there is a live optical signal). Looking directly into the end can cause permanent damage to the eyes, as the light intensity can harm the retina.

Answer:

D. Looking into the end of a fiber optic cable