Electricity & Magnetism
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What is electric charge?
A property of matter that causes it to experience force in an electric field; it comes in positive and negative.
What is electric current?
The rate of flow of electric charge, measured in amperes.
What is voltage?
The electric potential difference that drives current, measured in volts.
What is resistance?
Opposition to current flow, measured in ohms.
State Ohm's law.
Voltage equals current times resistance (V = IR).
What is a conductor?
A material that lets charge flow easily, such as copper.
What is an insulator?
A material that resists charge flow, such as rubber or glass.
What is electrical power?
The rate of energy transfer, P = IV (watts).
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