Correct answer
To prevent an increase in current from damaging the various components of the circuit.
They protect circuits against excessive current: the fuse element melts and opens the circuit under its specified operating conditions. They do not distribute current or prevent its direction from changing. They are not voltage regulators: an overvoltage that does not produce sufficient overcurrent need not operate the fuse. Replace a fuse with the manufacturer’s specified type and rating, never a wire bridge; repeated blowing requires investigation of the fault.
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To prevent the current flowing through the circuit from changing direction.
To distribute the current before it passes through the various components that make up the circuit.
To prevent an increase in current from damaging the various components of the circuit.
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