Inducing Currents

Inducing Currents

Assessment

Flashcard

Science

9th - 12th Grade

Practice Problem

Hard

Created by

Barbara White

FREE Resource

Student preview

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12 questions

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1.

FLASHCARD QUESTION

Front

Electromagnetic Induction Noun

[ih-lek-troh-mag-net-ik in-duhk-shun]

Back

Electromagnetic Induction


The process of generating an electric current in a circuit by using a changing magnetic field near the conductor.

Example: Rotating a wire coil (a conductor) within a magnetic field causes electrons to move, creating an electric current that can power a device like a lightbulb.
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2.

FLASHCARD QUESTION

Front

Electromotive Force (EMF) Noun

[ih-lek-troh-moh-tiv fors]

Back

Electromotive Force (EMF)


A difference in electric potential, measured in volts, that provides the energy for electric charges to flow in a circuit.

Example: A force inside the battery, called Electromotive Force (EMF), separates charges, providing the energy to push electricity through the circuit and light the bulb.
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3.

FLASHCARD QUESTION

Front

Induced Electromotive Force Noun

[in-doost ih-lek-troh-moh-tiv fors]

Back

Induced Electromotive Force


The potential difference created in a conductor when it moves through a magnetic field or is in a changing magnetic field.

Example: Moving a magnet near a coil of wire creates a voltage (electromotive force), which causes an electric current to flow through the coil.
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4.

FLASHCARD QUESTION

Front

Electric Generator Noun

[ih-lek-trik jen-uh-rey-ter]

Back

Electric Generator


A device that converts mechanical energy into electrical energy by rotating wire loops within a magnetic field.

Example: This diagram shows an electric generator. Rotating a coil of wire (mechanical energy) inside a magnetic field forces electrons to move, creating an electric current (electrical energy).
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5.

FLASHCARD QUESTION

Front

Armature Noun

[ahr-muh-cher]

Back

Armature


The rotating component of an electric generator or motor, typically consisting of wire coils wound around an iron core.

Example: This diagram shows an armature, which includes the rotor coils and commutator. When the armature spins within the stator magnets, an electric current is induced.
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6.

FLASHCARD QUESTION

Front

Direct Current (DC) Noun

[dih-rekt kur-uhnt]

Back

Direct Current (DC)


An electric current in which the electric charges consistently flow in only one direction within a circuit.

Example: This diagram shows a circuit with a battery providing Direct Current (DC), which is a flow of electric charge that is constant in one direction.
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7.

FLASHCARD QUESTION

Front

Alternating Current (AC) Noun

[awl-ter-ney-ting kur-uhnt]

Back

Alternating Current (AC)


An electric current that periodically reverses its direction, typically varying sinusoidally over time at a regular frequency.

Example: This graph shows how Alternating Current (AC) repeatedly changes direction, moving from positive to negative in a smooth wave as an alternator shaft rotates.
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