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Chapter 20.2 - Electric Current & Ohm's Law
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Terms in this set (12)
The continuous flow of electric charge
Electric current
Type of current where charge flows only in one direction
Direct current
Type of current where the flow of electric charge reverses its direction
Alternating current
SI unit of electric current
Ampere
Material through which charge can flow easily
Electrical conductor
Material through which charge cannot flow easily
Electrical insulator
Factors that affect electrical resistance (3)
Thickness, length, temperature
Opposition to the flow of charges in a material
Resistance
Material that has almost zero resistance when it is cooled to low temperatures
Superconductor
The difference in electrical potential energy between two places in an electric field
Potential difference
According to this law, the voltage in a circuit equals the product of the current and the resistance
Ohm's law
Equation for Ohm's law
V = I x R
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