# Induction and Inductance

## A Reformulation Of Faraday’s Law

A Reformulation Of Faraday’s Law Consider a particle of charge qo moving around the circular path of  . The work W done on it in one revolution by the induced electric field is  where is the induced emf-that is, the work done per unit charge in moving the test charge around the path. From another point …

## Induction and Energy Transfers

Induction and Energy Transfers By Lenz ‘s law, whether you move the magnet toward or away from the loop in , a magnetic force resists the motion. requiring your applied force to do positive work. At the same time, thermal energy is produced in the material of the loop  because of the material’s electrical resistance to …

## Electric Guitars

Electric Guitars Fender Stratocaster, the type of electric guitar that was used by Jimi Hendrix and by many other musicians. Whereas an acoustic guitar depends for its sound on the acoustic resonance produced in the hollow body of the instrument                 by the oscillations of the strings, an electric guitar …

## Lenz’s Law

Lenz’s Law Soon after Faraday proposed his law of induction. Heinrich Friedrich Lenz devised a rule-now known as Lenz’s law-for determining the direction of an induced current in a loop:   An induced current has a direction such  that the magnetic field due to the current opposes the change in the magnetic flux that induces the current. Furthermore, …

## A Quantitative Treatment

A Quantitative Treatment To put Faraday’s law to work. we need a way to calculate the amount of magnetic field that passes through a loop. In Chapter 24, in a similar situation, we needed to calculate the amount of an electric field that passes through a surface. There we  defined an electric flux ¢lE = f i·iA. …

## Faraday’s Law of Induction

Faraday’s Law of Induction Faraday realized that an emf and a current can be induced in a loop, as in our two  experiments, hy changing the amount of magnetic field passing through the loop. He further realized that the “amount of magnetic field” can be visualized in terms of the magnetic field lines passing through the …

## Two Experiments

Two Experiments Let us examine two simple experiments to prepare for our discussion of Faraday’s law of induction. First Experiment. Figure 31-1 shows a conducting loop connected to a sensitive  current meter. Since there is no battery or other source of  included. there is no current in the circuit. However. if we move a bar magnet …

## Two Symmetric Situations

Two Symmetric Situations In Section , we saw that if we put a closed conducting loop in a magnetic field and then send current through the loop, forces due 10 the magnetic field create a torque to turn the loop torque to turn the loop: current loop + magnetic, field=torque. Suppose that, instead, with the current off, we …

## Induction and Inductance

Induction and Inductance Soon after rock began in the mid”1950s, guitarists switched from acoustic guitars to electric guitars- but it was Jimi Hendrix who first understood the electric guitar as an electronic instrument He exploded on the scene in the 1960s. ripping his pick along the strings, positioning himself and his guitar in front of a speaker to …