Question

One frame of a standard closed circuit television system used in the united states will consist of

1. 525 scan lines
2. 625 scan lines
3. 874 scan lines
4. 262 scan lines

Answer 1

A standard closed-circuit television system frame in the United States typically consists of 525 scan lines, following the NTSC analog television standard.

Step-by-step explanation:

The student's question concerns the number of scan lines in one frame of a standard closed-circuit television system commonly used in the United States. The correct answer is that a standard frame consists of 525 scan lines. This is characteristic of the NTSC (National Television System Committee) analog television system, which was widely used in North America before the transition to digital broadcasting.

Television is broadcast on electromagnetic waves, utilizing frequencies in specific ranges designated for VHF (very high frequency) and UHF (ultra high frequency) channels to carry both visual and audio information.