The correct answer is C. The heating effect of the current.
An electric fuse is a safety device that is used to protect electrical circuits from damage caused by excessive current. Fuses are typically made of a metal wire that has a low melting point. When too much current flows through the fuse, the wire heats up and melts, breaking the circuit and preventing damage to the equipment.
The chemical effect of the current is not used in electric fuses. The magnetic effect of the current is sometimes used in electric fuses, but it is not the primary mechanism by which fuses work.
Here is a more detailed explanation of each option:
- Option A: The chemical effect of the current. This is not used in electric fuses. Fuses work by heating up and melting, not by causing chemical reactions.
- Option B: The magnetic effect of the current. This is sometimes used in electric fuses, but it is not the primary mechanism by which fuses work. Some fuses have a small piece of metal that is attracted to a magnet when the current is too high. This causes the metal to break the circuit and stop the flow of current. However, this is not the only way that fuses work, and it is not the primary mechanism by which most fuses work.
- Option C: The heating effect of the current. This is the primary mechanism by which electric fuses work. When too much current flows through a fuse, the wire heats up and melts. This breaks the circuit and prevents damage to the equipment.
I hope this explanation is helpful. Please let me know if you have any other questions.