PGC Power Substation Part 1 Exam 2025 – 400 Free Practice Questions to Pass the Exam

The term 'Flicker' in electricity distribution specifically refers to the unsteadiness induced by fluctuating light stimuli, which typically occurs when there are rapid variations in voltage. These fluctuations can lead to noticeable and annoying changes in brightness within lighting systems. Flicker is particularly relevant in systems with sensitive lighting, where even minor variations in electrical supply can lead to visual disturbances.

This phenomenon can be caused by various factors such as the operation of large loads that draw significant current, which, when switched on or off, can impact the voltage stability and consequently the brightness of lights. Understanding flicker is vital for ensuring a stable power supply and maintaining the quality of service in electrical systems, especially in environments where consistent lighting is crucial. The other options describe different electrical issues that are not related to the specific phenomenon of flicker.