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# Electronics

### Electronics Part 2

What is resistance? Opposition to the flow of current.
Opposition to the flow of current is known as _______. Resistance.
What tool is used to measure resistance? Ohmmeter
What is one unit of electrical resistance called? Ohm
What is an ohm? An ohm is the amount of resistance that will allow one ampere of current to flow if one volt of electrical pressure is placed on a conductor.
What is the symbol for an ohm? Ω
Most cable and wire is currently made from _______. Copper
What does Ohm's law state? Ohm's Law states that voltage in volts is equal to the current in amperes multiplied by the resistance in ohms.
What is the formula for Ohm's law? E=I*X
In Ohm's law, what does each letter represent? E = Voltage I = Current R = Resistance
What does mA stand for? Milliamphere
What is a milliampere? A milliamhere is 1/1000 of an ampere.
How can a milliampere be converted to an ampere? By moving the decimal point three places to the left. Example: 500 mA would be the same as .5 A
What is a kilohm? A Kilohm (KΩ) is 1,000 ohms.
What is the symbol for a kilohm?
What is a megohms? A megohm (MΩ) is 1,000,000 ohms.
What is the symbol for a megohm?
How can a kilohm be converted into an ohm? Move the decimal point three places to the right. 6 KΩ would then become 6,000 Ω.
How can a megohm be converted to an ohm? Moving the decimal point 6 places to the right. 10MΩ would the become 10,000,000
What is a millivolt? A millivolt is the same as 1/1000 of a volt.
What is the symbol for a millivolt? mV
How can a millivolt be converted to a volt? Move the decimal point 3 places to the left. 1000mV would be the same as 1 V.
What does KV stand for? Kilovolt.
What does MV stand for? Megavolts.
Created by: Cheetahman