The correct answer is A. burning.
A fuse is a safety device that is used to protect electrical circuits from overloads and short circuits. It is a small, cylindrical device that contains a thin wire that is made of a material that melts at a relatively low temperature. When the current in the circuit exceeds the fuse’s rated current, the wire melts and breaks the circuit, preventing damage to the circuit and the equipment connected to it.
The fuse blows off by burning because the wire is made of a material that melts at a relatively low temperature. When the current in the circuit exceeds the fuse’s rated current, the wire heats up and melts. This breaks the circuit and prevents damage to the circuit and the equipment connected to it.
The other options are incorrect because they do not describe the correct way that a fuse blows off. Option B, arcing, is the process of electricity jumping across a gap between two conductors. This can happen if the insulation on the conductors is damaged or if there is a loose connection. Option C, melting, is the process of a material becoming liquid due to heat. This can happen to the wire in a fuse if the current in the circuit exceeds the fuse’s rated current. However, the wire does not melt because of arcing. Option D, none of the above, is also incorrect because it does not describe the correct way that a fuse blows off.