What will the red light be fifteen seconds after Sw 1 is closed?

In this scenario, the question is asking about the state of a red light after a specified period following the closure of a switch (Sw 1). If Sw 1 is a switch that controls the red light directly or indirectly, then closing it would initiate a circuit, allowing current to flow.

Fifteen seconds after the switch is closed, one would expect the red light to be in a steady state of illumination if the circuit is designed to turn the light on when the switch is engaged. In many electrical circuits, especially in simple configurations, the expected behavior when a switch is closed is that connected lights or devices remain in an "on" state as long as the switch stays closed, assuming there are no timers or other components that alter this behavior after the initial switch closure.

Therefore, since the switch has been closed for a sufficient time (fifteen seconds), the red light will be continuously powered and thus will be illuminated, resulting in the light being "ON" after that duration. This understanding aligns with standard electrical principles regarding the operation of simple lighting circuits.