Answer:
d) Neither A nor B is correct
Step-by-step explanation:
We are given the arguments of two technicians thus:
Technician A says that the relay's coil is energized when the circuit's control switch is open. This action connects power to the load circuit.
Technician B says that a relay is an electric switch that allows a large amount of current to control a low-current circuit.
A relay is an electrical actuator/switch that allows a relatively small electrical voltage or current to control a larger voltage or current. This negates Technician B statement about the functionality of the actuator/switch.
When the control circuit switch is open no current flows to the coil of the relay negating Technician A statement.
Consequently neither Technician A nor B's argument is correct option D is right.