Inducing Current

Inducing Current

Assessment

Flashcard

Science

9th Grade

Hard

Created by

Barbara White

FREE Resource

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11 questions

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1.

FLASHCARD QUESTION

Front

Magnetic Flux Noun

[mag-net-ik fluhks]

Back

Magnetic Flux


A measure of the total magnetic field passing through a given area, proportional to field strength and the perpendicular area.

Example: Magnetic flux measures the number of magnetic field lines passing through a surface. Flux is maximum when the surface is perpendicular to the lines and minimum when parallel.
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2.

FLASHCARD QUESTION

Front

Electromotive Force (EMF) Noun

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

Back

Electromotive Force (EMF)


The energy provided per unit of charge by an energy source, which acts as the 'electrical pressure' driving current.

Example: Rotating a wire coil within a magnetic field induces an electromotive force (EMF), creating an electric current that powers the light bulb.
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3.

FLASHCARD QUESTION

Front

Volt (V) Noun

[vohlt]

Back

Volt (V)


The standard unit of measurement for electromotive force and electric potential difference, representing energy per unit of charge.

Example: This diagram uses a water analogy to show that voltage is like water pressure; the greater the height (voltage), the stronger the 'push' causing the water (electric charge) to flow.
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4.

FLASHCARD QUESTION

Front

Induction Noun

[in-duhk-shuhn]

Back

Induction


The process of producing an electromotive force and current in a conductor by changing the magnetic flux passing through it.

Example: Moving a magnet near a coil of wire creates a changing magnetic field, which induces an electric current in the wire, as shown by the galvanometer.
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5.

FLASHCARD QUESTION

Front

Faraday's Law Noun

[fair-uh-days law]

Back

Faraday's Law


A fundamental law of physics predicting how a changing magnetic field will induce an electromotive force in an electric circuit.

Example: Moving a magnet toward or away from a coil of wire changes the magnetic field, which induces an electric current, as shown by the voltmeter's needle.
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6.

FLASHCARD QUESTION

Front

Lenz's Law Noun

[len-ziz law]

Back

Lenz's Law


A principle stating that the direction of an induced current is always such that it opposes the change in magnetic flux.

Example: Moving a wire through a magnetic field (between the N and S poles) forces electrons to move along the wire, creating an induced electric current.
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7.

FLASHCARD QUESTION

Front

Motional EMF Noun

[moh-shuhn-uhl ee-em-ef]

Back

Motional EMF


An electromotive force induced in a conductor moving through a magnetic field, or by a change in the circuit's area.

Example: Moving a conducting rod through a magnetic field creates a voltage (EMF), which pushes electric charges to flow as a current through the circuit.
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