Mobile Electronics Glossary of Terms and Definitions - N

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Mobile Electronics Glossary - N

•	n0 - The reference efficiency of the system (eta sub 0) dimensionless, usually expressed as %
•	Nano (n) - A prefix meaning 10^-9 or 0.000 000 001
•	Noise - 1 Unwanted sound of no specific frequency or amplitude. 2 Random sound of many frequencies not harmonically related (buzzing, hiss, pops, static, whine, etc.).
•	Nominal Impedance - The minimum impedance a loudspeaker presents to an amplifier, directly related to the power the speaker can extract from the amplifier.
•	Normally Closed - Refers to the electrical state in which a switch may rest. Its contacts are held together or closed so that current is allowed to flow through its contacts.
•	Normally Open - Refers to the electrical state in which a switch may rest. Its contacts are held apart or open so that no current flows through its contacts.
•	NTSC - National Television System Committee. Refers to the standards used for video broadcast and playback signal parameters.
•	# - Symbol for number, as in you are # 1.

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Mobile Electronics Basics:
• Diodes
• Glossary of Terms and Definitions
• Ohm's Law
• Recommended Books & DVD's
• Recommended Wire Sizes
• Relays
• Resistors
• Tools and Equipment

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