Among various electrical safety devices, one based on the heating effect of electric current is called a:

Correct option is A

The correct answer is (a) fuse.
· A fuse is an electrical safety device that operates based on the heating effect of electric current. It is designed to protect electrical circuits from damage caused by an excessive current flow.
· When the current flowing through the fuse exceeds its rated value, the heat generated by the current causes the fuse wire to melt, thereby breaking the circuit and preventing damage to the connected devices.
Information Booster:
· Circuit Breaker: An automatic switch that interrupts the flow of current in case of an overload or short circuit. It can be reset manually or automatically, unlike a fuse which needs to be replaced after operation.
· Protective Relay: A device used in electrical systems to detect faults and initiate the operation of circuit breakers to isolate the faulty section. It does not work on the heating effect of electric current.
· Surge Protector: A device that protects electrical equipment from voltage spikes by diverting excess voltage to the ground. It does not operate based on the heating effect of current.