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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.

Electromagnetic Induction

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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• 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

The Ring Launcher Explanation

Provides a physics explanation to the famous ring launcher demonstration.
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• Video

Ring Launcher in Slow Motion

The ring launcher demonstration is shown in slow motion.
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Inductance Quiz - PPB

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

A list of student-submitted discussion questions for Inductance.
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• Study Guide

Magnetism Study Guide

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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