Key Concepts. 1  The electrons on the outermost energy level of the atom are called valence electrons. 2  The valence electrons are involved in bonding one atom to another. 3  The attraction of each atomâs nucleus for the valence electrons of the other atom pulls the atoms together.
NTSC is the format used in the United States and Canada. NTSC stands for National Television Standard Committee which established the American TV broadcast TV standard as a 525 line broadcast. The NTSC system has higher frame rate (60 Hz) which reduces visible flicker and picture noise.
The two most common video standards used are NTSC (National Television Standards Committee) and PAL (Phase Alternating Line). NTSC is the video system or standard used in North America and most of South America. While PAL is the predominant or standard video system mostly used in European, Australia and Asian countries. Besides this difference, follow this tutorial-Difference between NTSC and PAL, you will know more detailed information about NTSC and PAL. Frist: Electrical Power System behind the transmissions on TV.