Basic Electrical Terms
The flow of electric charge through a conductor.
What is current?
The formula relating voltage, current, and resistance.
What is Ohm's Law (V = I × R)?
A tool used to measure voltage, current, and resistance.
What is a multimeter?
The first thing to do before working on electrical equipment.
What is disconnecting power?
The component that controls current flow by opening or closing a circuit.
What is a switch?
The unit used to measure electrical resistance.
What is an ohm?
Current in a circuit with 12 V and 6 Ω resistance.
What is 2 amps?
A hand tool used to remove insulation from wire.
What are wire strippers?
PPE stands for this.
What is Personal Protective Equipment?
The component designed to protect a circuit by melting when excessive current flows.
What is a fuse?
The force that pushes electrons through a circuit.
What is voltage?
Resistance in a circuit with 24 V and 4 A current.
What is 6 ohms?
This device protects circuits by opening when current gets too high.
What is a circuit breaker?
The procedure used to prevent accidental energization of equipment.
What is Lockout/Tagout (LOTO)?
In North American wiring, this conductor is usually white.
What is the neutral wire?
The unit used to measure electrical power.
What is a watt?
Voltage in a circuit with 5 A flowing through 20 Ω.
What is 100 volts?
A tool used to verify that a wire is energized without touching bare conductors.
What is a non-contact voltage tester?
This safety device helps prevent shock by detecting current leakage.
What is a GFCI?
This component stores electrical energy in an electric field.
What is a capacitor?
The opposition to current flow in a circuit.
What is resistance?
Current through a 120 V circuit with 15 Ω resistance.
Current through a 120 V circuit with 15 Ω resistance.
This instrument measures current without disconnecting the conductor.
What is a clamp meter?
OSHA requires workers to maintain this around energized equipment.
What is a safe working clearance distance?
This device uses electromagnetic induction to change voltage levels.
What is a transformer?