magnetism/electromagnetism

Iron

Iron

________ is made up of a set of regions called domains.

compass

A(n) ________ is a magnetic needle that will always point north.

nickel

A magnet is an object that is able to attract other objects containing iron, comma, ________, cobalt.

North Pole

Bar magnet: Which has a(n) ________ and a South Pole.

Horseshoe magnet

________: Which attracts iron containing objects.

Iron

________ is not the only element with properties of similar to magnetite, dot, cobalt, and Nickel can also act like magnets or attracted by magnets.

Horseshoe magnet

Which attracts iron containing objects

Bar magnet

Which has a North Pole and a South Pole

What is a magnet?

is an object that can attract other objects containing iron, cobalt or nickel.

magnetic field

is the area of space in which the magnetic force of a magnet can act on another magnet.

Electromagnetism

describes all the phenomena resulting from the interaction between electricity and magnetism.

How to determine the direction of a magnetic field?

solenoid

is a cylindrical coil of live wire.

What are magnetic lines of a solenoid?

How to determine them?

What can happen with magnetic solenoid?

The magnetic field of a solenoid can be “switched on” or “switched off” at will, but the magnetic field of a magnet cannot.

The direction of the magnetic field lines of a solenoid can be altered by reversing the current direction, while the magnetic field lines of a magnet cannot be reversed because the poles of the magnet cannot be reversed (unless the polarity of the entire magnet is reversed).

The intensity of the magnetic field of a solenoid can be modified, but the same is not true for a magnet.

how can a power of electromagnet be increased?

by increasing the intensity of the electric current flowing through the solenoid

by adding more loops to the solenoid

by using a core with a lower magnetic remanence (whose domains can be aligned more quickly and easily)

ELECTROMAGNETIC INDUCTION

consists in generating an electric current in a conductor by varying a magnetic field around that conductor.

To generate an electrical field, a magnetic field must be in motion relative to a charge or a conductor. This can be achieved in one of two ways:

by moving a conductor inside a magnetic field

by moving a magnet around a conductor