Review Electromagnetic Induction

Electromagnetic Induction

Brief Review with Comics

ELECTROMAGNETIC INDUCTION

Discovery in Oestedland...

To review the concepts on electromagnetic induction discussed yesterday, while waiting for others, let's start reading the comics strip then answer the questions related to it.

Multiple Choice

Who among the characters has a "force" to move charges?

• Mr. Magnet

• Miss Wiry

• Mr. Galvanometer

• Miss Antsy

• is the characteristic of any energy source capable of driving electric charge around a circuit

• abbreviated E but also, popularly, as emf

not really a force

for emf vs voltage​ visit https://www.vedantu.com/physics/difference-between-emf-and-voltage

​EMF

Multiple Choice

What is the purpose of calling Mr. Galvanometer?

• To measure a small amount of current

• To measure the voltage produced

• To measure the resistance in the wire

• To measure power output

instrument for measuring a small electrical current or a function of the current by deflection of a moving coil

since the induced current can be really little

Galvanometer

​

Multiple Select

(more than 1 answer) Who must move to "push" the charges?

• Mr. Magnet

• Miss Antsy

• Mr. Galvanometer

• Miss Wiry

ELECTROMAGNETIC INDUCTION

DEFINITION

the production of an electromotive force across an electrical conductor in a changing magnetic field

So it doesn't matter which moves as long as there is changes in the magnetic field.

Multiple Choice

Which of the following will result in more moving charges?

• Using a bigger magnet

• Using a shorter wire

• Adding more galvanometer

• Adding more loops of wire

Producing more induced current

1. ​Using a STRONGER magnet

2. Moving the magnet/wire FASTER

3. Increasing the length of the wire exposed to the changing magnetic field (increasing the number of loops of increasing the area)​

Electromagnetic Induction | Robotics

Multiple Choice

What is induced current?

• current generated in a wire due to a changing magnetic field

• current generated in a wire due to a changing electric field

• current generated in a wire due to the presence of a wire

• current generated in a wire due to the presence of a galvanometer

​a quantitative relationship between a changing magnetic field and the electric field created by the change​

Faraday’s Law of Induction​

​from: britannica.com

developed on the basis of experimental observations made in 1831 by the English scientist Michael Faraday

Faraday’s Law of Induction​

​from: britannica.com