Electric Circuits Quiz

current

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

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.

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

<p>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.</p> Signup and view all the answers

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

<p>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.</p> Signup and view all the answers