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T5A - Electrical principles

Technician Class

Current and voltage: terminology and units, conductors and insulators, alternating and direct current

11 questions | Updated: Feb 19, 2026

All T0A T0B T0C T1A T1B T1C T1D T1E T1F T2A T2B T2C T3A T3B T3C T4A T4B T5A T5B T5C T5D T6A T6B T6C T6D T7A T7B T7C T7D T8A T8B T8C T8D T9A T9B
T5A01

Electrical current is measured in which of the following units?
T5A02

Electrical power is measured in which of the following units?
T5A03

What is the term for the flow of electrons in an electric circuit?
T5A04

What term describes the number of times per second that an alternating current makes a complete cycle?
T5A05

A difference in which of the following causes electron flow?
T5A06

What is the unit of frequency?
T5A07

Why are metals generally good conductors of electricity?
T5A08

Which of the following is a good electrical insulator?
T5A09

Which of the following describes alternating current?
T5A10

Which term describes the rate at which electrical energy is used?
T5A11

What type of current flow is opposed by resistance?