Consider the following statements:
S1: The wire in an electric circuit heats up due to the resistance it offers to the flow of electric current.
S2: All electric wires used in circuits are designed to heat up and emit light as a standard feature.
S3: Electric fuses are designed based on the principle that certain materials melt quickly when overheated.
S4: All electrical appliances incorporate fuses as a mandatory component to manage overheating.
1
Only S1 and S3 are true
2
S1, S2, and S3 are true.
3
S2, S3, and S4 are true.
4
S1, S3, and S4 are true.