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# Electromotive Force

## The potential difference within a circuit that is needed to maintain current flow.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Electromotive Force

Discusses Faraday’s discovery of electromagnetic induction.
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## Electromotive Force**

Discusses Faraday’s discovery of electromagnetic induction.
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## Unit 14.4 Electromotive Force

Discusses Faraday’s discovery of electromagnetic induction.
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• Interactive Simulations

## AC Transformer

Learn about how high-voltage alternating current (AC) electricity generated by a power station is converted into low-voltage AC electricity for your home.
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• Video

## Simple Electricity Generator

Demonstrates how mechanical energy can be converted into electrical energy by changing magnetic flux and thus inducing an EMF.
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## Electromotive Force Quiz

Reviews electric motors and generators and problems involving voltage running through wires.
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• Real World Application

## Microwaves

Discover how microwaves work.
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• Study Guide

## Electromotive Force

A guide to electromotive force
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