Question

214. The flicker effect of fluorescent lamp is more pronounced at >(A) lower voltages → (B) higher voltages >(C) lower frequencies​

Answer 1

Answer:

C) lower frequency

Explanation:

Fluorescent lamps with magnetic ballasts flicker at a normally unnoticeable frequency of 100 or 120 Hz (twice of the utility frequency; the lamp is lit on both the positive and negative half-wave of a cycle).

This flickering can cause problems for some individuals with light sensitivity and are associated with headaches and eyestrain.

The flicker effect of fluorescent lamps is more pronounced at lower frequencies