Final answer:
Neither Technician A nor B is correct; an electrical circuit with a complete path is called a closed circuit, while a circuit with a broken path is called an open circuit.
Step-by-step explanation:
In an electrical circuit, terminology such as 'open' and 'closed' is used to describe the state of the circuit. Technician A suggests that when there is a complete path through the electrical circuit, the circuit is said to be open, which is incorrect.
The correct term for a circuit with a complete path for current to flow is 'closed circuit.' On the other hand, Technician B says that when the circuit path is broken or interrupted, the circuit is said to be closed, which is also incorrect. The appropriate term for a circuit where the path is broken and current cannot flow is 'open circuit.'
Therefore, the correct answer is d. neither A nor B. An example of a closed circuit is a simple electric circuit with a battery connected to a load, such as a light bulb, where the current flows through the conducting wires, while an open circuit is when there is an open switch that breaks the flow of current.