Free 5-question sample test with instant feedback. See how ready you are.
Question 1
What is the term for the unit that measures the strength or pressure of an electric current?
Answer: A volt (V) measures the pressure or force that pushes electric current through a conductor.
Question 2
What unit measures the rate at which electrical energy is consumed or the amount of work performed by electricity?
Answer: A watt (W) measures the rate of electrical energy consumption, calculated as volts multiplied by amperes.
Question 3
What is the difference between alternating current (AC) and direct current (DC)?
Answer: Alternating current (AC) reverses direction periodically and is used in standard wall outlets, while direct current (DC) flows in one direction only and is used in battery-powered devices and some esthetic modalities.
Question 4
What is a conductor in the context of electricity?
Answer: A conductor is any material that allows electric current to flow through it easily, such as copper, silver, or the human body.
Question 5
What does an ohm measure in an electrical circuit?
Answer: An ohm measures electrical resistance — the opposition to the flow of electric current through a conductor.