Electrical Theory Flashcards
6 cards from real EIAT and NEIEP Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Electrical Theory flashcards as text
What is the effect of increasing temperature on most conductors?
Answer: Resistance increases
In most conductors, higher temperatures increase atomic vibration, impeding electron flow and increasing resistance.
A transformer is used to:
Answer: Step voltage up or down
A transformer uses electromagnetic induction to step AC voltage up or down between two or more circuits.
What is a diode's primary function in a circuit?
Answer: Allow current to flow in one direction only
A diode allows current to flow in only one direction (from anode to cathode), acting as a one-way valve.
The term 'ground' in an electrical circuit refers to:
Answer: A reference point at zero potential
Ground (earth) serves as a reference point at zero electrical potential and provides a safe path for fault current.
Three-phase power is most commonly used in:
Answer: Industrial motors and machinery
Three-phase power is used in industrial settings because it efficiently powers large motors and machinery.
What instrument measures electrical resistance?
Answer: Ohmmeter
An ohmmeter measures electrical resistance in ohms and must be used on a de-energized circuit.
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