NTSC is based on power line frequency in which region?

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Multiple Choice

NTSC is based on power line frequency in which region?

Explanation:
NTSC is tied to the local power line frequency, and it was designed around the 60 Hz mains used in North America. That 60 Hz field rate drives the interlaced video, giving about 60 fields per second (roughly 29.97 frames per second). Regions with 50 Hz mains (Europe, much of Africa, parts of Asia) use the PAL/SECAM systems with a 50 Hz field rate and 25 fps. So NTSC is based on North America’s power frequency.

NTSC is tied to the local power line frequency, and it was designed around the 60 Hz mains used in North America. That 60 Hz field rate drives the interlaced video, giving about 60 fields per second (roughly 29.97 frames per second). Regions with 50 Hz mains (Europe, much of Africa, parts of Asia) use the PAL/SECAM systems with a 50 Hz field rate and 25 fps. So NTSC is based on North America’s power frequency.

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