What is the difference between an open circuit and a closed circuit.

a. An open circuit has a break in the circuit path, while a closed circuit does not.
b. An open circuit is only used in AC circuits, while a closed circuit is only used in DC circuits.
c. An open circuit is always on, while a closed circuit is always off.
d. An open circuit has a higher voltage than a closed circuit.
Answer: a. An open circuit has a break in the circuit path, while a closed circuit does not.