Electrical Circuits Quiz: Test Your Knowledge with Flashcards

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

The flow of electric charge is called ______

current

Question 1

Explain the difference between AC and DC current, and provide an example of each.

Answer 1

AC, or alternating current, is a type of electrical current that periodically changes direction, while DC, or direct current, flows continuously in one direction. An example of AC is the electricity supplied to homes and businesses, while an example of DC is the electricity stored in batteries.

A device that converts electrical energy into mechanical energy is called a ______

motor Signup and view all the answers

The unit of electric power is ______

watt Signup and view all the answers

Question 2

What is the purpose of a capacitor in an electric circuit, and how does it work? Signup and view all the answers

Answer 2

A capacitor is an electrical component that stores energy in an electric field. Its main purpose is to temporarily hold a charge and release it when needed. It works by allowing electrical charge to build up on two conductive plates separated by an insulating material, such as air or plastic. Signup and view all the answers

Question 3

Explain the function of a transistor in an electric circuit, and provide an example of its use. Signup and view all the answers

Answer 3

A transistor is a semiconductor device that can amplify or switch electronic signals. Its main function is to control the flow of current in a circuit. An example of its use is in an audio amplifier, where it is used to amplify the small electrical signals from a microphone or a guitar pickup. Signup and view all the answers

Flashcards

Electric Current

The movement of electric charge through a conductor.

Alternating Current (AC)

A type of electrical current that periodically changes direction.