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# Electromagnetic Induction

## Passing a loop of wire around a magnetic field can generate electrical current in the loop.

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.
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## Electromagnetic Induction

by CK-12 //at grade
Students will learn how to determine the flux and how to calculate the induced voltage. In addition, Students will learn Lenz law and how to use it to determine the direction of the induced current in a loop of wire.
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• Read

## Electromagnetic Induction

by Doug Davidson //basic
What electromagnetic induction is and how it occurs, the current produced from it and how it is used.
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• Interactive Simulations

## AC Transformer

by CK-12 //at grade
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

## How It's Made Induction Cooktops

by CK-12 //basic
A great video that shows how induction cooktops are made, courtesy of Discovery / Science Channel
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• Video

## The Ring Launcher Explanation

by CK-12 //at grade
Provides a physics explanation to the famous ring launcher demonstration.
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• Video

## Ring Launcher in Slow Motion

by CK-12 //at grade
The ring launcher demonstration is shown in slow motion.
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• Video

## Introduction to Electromagnetic Induction - Overview

by CK-12 //basic
Overview
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• Video

## Motional EMF - Overview

by CK-12 //basic
Overview
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• Video

## Faraday's Law: Magnitude of Induced Current - Overview

by CK-12 //basic
Overview
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• Video

## Lenz's Law: Direction of the Induced Current - Overview

by CK-12 //basic
Overview
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• Video

## Introduction to Electromagnetic Induction - Example 1

by CK-12 //basic
Determining whether or not a current will be induced in a circuit given a scenario
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• Video

## Introduction to Electromagnetic Induction - Example 2

by CK-12 //basic
Determining the effect of changing the angle between a magnetic field and a circuit on the induced voltage and current
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• Video

## Introduction to Electromagnetic Induction - Example 3

by CK-12 //basic
Determining the effect of changing the number of magnetic field lines on the induced voltage and current
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• Video

## Motional EMF - Example 1

by CK-12 //basic
Determining the effect of changing the velocity, the length of wire, and the strength of the magnetic field on the induced voltage and current
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• Video

## Motional EMF - Example 2

by CK-12 //basic
Solving problems involving motional emf using the equation emf = vBl
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• Video

## Faraday's Law: Magnitude of Induced Current - Example 3

by CK-12 //basic
Determining the magnitude of induced current using the equation I = emf / R
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• Video

## Lenz's Law: Direction of the Induced Current - Example 1

by CK-12 //basic
Determining the direction of induced current by applying Lenz's law
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• Video

## Faraday's Law: Magnitude of Induced Current - Example 1

by CK-12 //basic
Determining the magnetic flux through a circuit using the equation Φ[B ]= ABcosθ
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• Video

## Faraday's Law: Magnitude of Induced Current - Example 2

by CK-12 //basic
Solving problems involving Faraday's law and the magnitude of induced emf using the equation emf = -NΔϕ[M]/Δt = -NΔ
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• Downloadable Quiz

## Inductance Quiz - PPB

by CK-12 //at grade
A changing magnetic field will induce a current that opposes the changing magnetic field. Calculate directions and electromagnetic flux.
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• Critical Thinking

## Inductance Discussion Questions

by CK-12 //at grade
A list of student-submitted discussion questions for Inductance.
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• Study Guide

## Magnetism Study Guide

by CK-12 //at grade
This study guide reviews electromagnetism concepts: magnetic field and field lines, first right hand rule, magnetic flux, solenoid, electromagnetic induction, force on charged particle, second right hand rule, and inductance.
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