Answer:
The concept has been explained below.
Step-by-step explanation:
The image given below is of an open circuit.
An open circuit refers to one in which the circuit is not complete and the current does not flow.
In the circuit the switch is open and hence the current does not flow because the circuit is not completed. If the switch were closed, the switch would have looked like a straight line.
So the bulbs will not glow and the lights will be off. If the circuit had been closed the current would have flowed in the clockwise direction from positive terminal to the negative terminal of the cell.