# How do electric motors use magnetic force to produce motion?

## How do electric motors use magnetic force to produce motion?

Which is an important step in how an electric motor uses magnetic force to produce motion? The armature rotates the axle in the magnetic field of a permanent magnet, which induces an electric current. The axle rotates the armature in the magnetic field of an electromagnet, which induces an electric current.

## How does an electric motor work with magnets?

An electric motor converts electrical energy into physical movement. Electric motors generate magnetic fields with electric current through a coil. The magnetic field then causes a force with a magnet that causes movement or spinning that runs the motor. Electric motors are used in all sorts of applications.

## How does an electric motor produce motion?

Electric motors turn electricity into motion by exploiting electromagnetic induction. A simple direct current (DC) motor is illustrated below. The motor features a permanent horseshoe magnet (called the stator because it’s fixed in place) and an turning coil of wire called an armature (or rotor, because it rotates).

## How does magnetic force flow through a magnetic field?

The general direction for the magnetic flux flow is from the North ( N ) to the South ( S ) pole. In addition, these magnetic lines form closed loops that leave at the north pole of the magnet and enter at the south pole. Lines of force always form individual CLOSED LOOPS around the magnet.

## What is the relationship between magnetic force and distance?

Magnetic force obeys an inverse square law with distance. The equation for magnetic force is similar to Coulomb’s Law (if you are familiar with it). But the key point is that the force is inversely proportional to the distance squared (i.e. it obeys an inverse square law with distance).

## Why can’t two lines of force cross each other?

Electric lines of force never intersect each other because, at the point of intersection, two tangents can be drawn to the two lines of force. This means two directions of the electric field at the point of intersection, which is not possible.

## Can magnetic lines cross each other?

Magnetic field lines can never cross, meaning that the field is unique at any point in space. Magnetic field lines are continuous, forming closed loops without beginning or end. They go from the north pole to the south pole.

## What will happen if the Earth’s magnetic field flips?

During an excursion or a reversal, the magnetic field is considerably weakened and allows many more cosmic rays to reach the surface of the planet. These energetic particles from space can be damaging to life on Earth if too many reach the surface.

## What happens if Earth’s magnetic field weakens?

A weaker magnetic field will make the planet more susceptible to solar radiation and put space equipment at risk.

## Can we live without a magnetic field?

“Whilst it probably wouldn’t be utterly catastrophic for life, there would be a much higher radiation dosage on the ground without a magnetic field,” said Martin Archer, a space plasma physicist at Queen Mary University of London. There is little evidence that past magnetic field variations have impacted life on Earth.

## Why did Mars lose its magnetic field?

For years, scientists believed that this field disappeared over 4 billion years ago, causing Mars’ atmosphere to be slowly stripped away by solar wind. Like Earth, Mars global magnetic field is believed to have been the result of a dynamo effect caused by action in its core.

The planet is still drying out today. And faster than expected. The Red Planet is a dead planet, but it may not have always been that way. Rovers and satellites have found clear evidence that the dusty Martian plains once flowed with rivers, which pooled into giant lakes, and perhaps fed into a global ocean.

## Did Mars have oceans?

The estimated volume of an ocean on Mars ranges from 3 meters to about 2 kilometers GEL (Global equivalent layer). This implies that a large amount of water was available on Mars. In 2018, a team of scientists proposed that Martian oceans appeared very early, before or along with the growth of Tharsis.

## Can we create a magnetic field on Mars?

Unlike the Earth, Mars has no inner dynamo to create a major global magnetic field. This, however, does not mean that Mars does not have a magnetosphere; simply that it is less extensive than that of the Earth. In addition to particles, the solar wind carries magnetic field lines from the Sun.

## Can Mars sustain human life?

However, the surface is not hospitable to humans or most known life forms due to the radiation, greatly reduced air pressure, and an atmosphere with only 0.16% oxygen. Human survival on Mars would require living in artificial Mars habitats with complex life-support systems.

## Who stepped on Mars first?

While those first several missions didn’t reach their target, NASA’s Mariner 4 finally did. The spacecraft launched on Nov. 28, 1964, and was the first to fly by Mars on July 14, 1965. It sent 21 photos of the Red Planet back to Earth.

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