What happens when a fuse operates due to over-current?

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Multiple Choice

What happens when a fuse operates due to over-current?

Explanation:
When current exceeds the fuse rating, the fusible element heats up due to I^2R losses and melts, creating an opening in the conductor. This interrupts the circuit and stops current flow to protect the rest of the system. So the correct description is that it opens the circuit. It may overheat as part of the process, but the essential outcome is an open circuit; remaining intact would be incorrect, and merely overheating doesn’t capture the required interruption.

When current exceeds the fuse rating, the fusible element heats up due to I^2R losses and melts, creating an opening in the conductor. This interrupts the circuit and stops current flow to protect the rest of the system. So the correct description is that it opens the circuit. It may overheat as part of the process, but the essential outcome is an open circuit; remaining intact would be incorrect, and merely overheating doesn’t capture the required interruption.

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