# What does magnetic field do for Earth?

## What does magnetic field do for Earth?

Generated by the motion of molten iron in Earth’s core, the magnetic field protects our planet from cosmic radiation and from the charged particles emitted by our Sun. It also provides the basis for navigation with a compass.

What is magnetic field direction?

• The direction the magnetic field produced by a. moving charge is perpendicular to the direction of motion. The direction of the force due to a magnetic field is perpendicular to the direction of motion.

What is H in electromagnetics?

The definition of H is H = B/μ − M, where B is the magnetic flux density, a measure of the actual magnetic field within a material considered as a concentration of magnetic field lines, or flux, per unit cross-sectional area; μ is the magnetic permeability; and M is the magnetization.

### What would happen if Earth’s magnetic field flipped?

This is what has happened when the magnetic poles flipped in the past. This could weaken Earth’s protective magnetic field by up to 90% during a polar flip. Earth’s magnetic field is what shields us from harmful space radiation which can damage cells, cause cancer, and fry electronic circuits and electrical grids.

How do you change the direction of a magnetic field?

Click the Reverse button to change the direction of the current flow and observe the effect this change exerts on the wire’s magnetic field. There is a simple method of determining the direction of the magnetic field generated around a current-carrying wire commonly called the right hand rule.

What is E field and H field?

The electric (E) field is much like the electric voltage potential (E) of an electric circuit. The magnetic (H) field is much like the electric current (I) of an electric circuit. NOTE: In this text, the symbol “E” usually refers to the electric field component of an EM field.

## How is Earth like a magnet?

Why is the earth like a magnet? Earth’s magnetic field is mostly caused by electric currents in the liquid outer core, which is composed of conductive, molten iron. From afar, the Earth looks like a big magnet with a north and south pole like any other magnet.

Where does magnetism come from in the Earth?

Scientists know that today the Earth’s magnetic field is powered by the solidification of the planet’s liquid iron core. The cooling and crystallization of the core stirs up the surrounding liquid iron, creating powerful electric currents that generate a magnetic field stretching far out into space.