What is a consequence of copper oxidation at a loose connection?

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Multiple Choice

What is a consequence of copper oxidation at a loose connection?

When copper forms an oxide layer at a loose connection, it creates a poorer metal-to-metal contact and reduces the effective cross-section through which current can flow. That makes the contact resistance higher. With current passing through, the extra resistance turns into heat, so the joint heats up (P = I^2R). The heating can worsen the connection, promote more oxidation, and lead to voltage drops or intermittent operation. So the key consequence is increased resistance at the joint and associated heating.

When copper forms an oxide layer at a loose connection, it creates a poorer metal-to-metal contact and reduces the effective cross-section through which current can flow. That makes the contact resistance higher. With current passing through, the extra resistance turns into heat, so the joint heats up (P = I^2R). The heating can worsen the connection, promote more oxidation, and lead to voltage drops or intermittent operation. So the key consequence is increased resistance at the joint and associated heating.

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