Final answer:
The four basic types of circuit problems are open circuit, closed circuit, intermittent trouble, and short circuit.
Step-by-step explanation:
In electrical circuits, the four basic types of circuit problems are open circuit, closed circuit, intermittent trouble, and short circuit.
A closed circuit is a circuit that allows current to flow through it, creating a complete loop for the electrical energy to move.
A grounded circuit occurs when one of the conducting wires in the circuit makes contact with the ground or an earthed object, which can disrupt the flow of current.