Multiple Choice Question (MCQ)
Question: What is the indication of neon polarity indicator used for checking AC supply?
A.
Both electrodes will glow
B.
Only one electrode will glow
C.
Both electrodes will be flickering
D.
One electrode will glow and another will be flickering
Correct Answer: Both electrodes will glow
Explanation
Neon circuit tester has no power by itself but uses a neon indicator light connected to a ballast resistor, and the light only glows when power is present. As the voltage increases, the neon test light glows brighter.