How Does an Electromagnet Switch on and Off?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How does an electromagnet switch on and off?

The Big Idea

Imagine a magnet you can switch on and off, like a light. It is called an electromagnet! Let's find out how one works, and how it is different from a regular magnet.

A Coil Around Iron

Step one: a coil around iron. An electromagnet is a coil of wire wrapped around an iron core. The iron core helps the magnet become stronger.

Switch On

Step two: switch on. When electricity flows through the wire, the coil makes a magnetic field. The iron gets magnetized, so it becomes a strong magnet.

Switch Off

Step three: switch off. When the electricity is turned off, the field disappears and the magnet lets go. Adding more turns of wire or more current makes it stronger.

A Closer Look

Let's take a closer look! A wire is wrapped in a coil. Iron sits in the middle. Electricity flows through the wire. The iron becomes a strong magnet.

Quick Facts

Quick facts! An electromagnet is often strong enough to lift a car when it is built large enough. More turns of wire make it stronger. More current makes it stronger too. And you can switch it on and off.

Think Like a Scientist

Now, think like a scientist! Draw a nail wrapped with wire connected to a battery. Label on and off. Draw what happens to a paper clip in each case. Use a drawing only, not a real circuit. Write down what you notice, and share it with a grown-up.

Outro

An electromagnet is a coil of wire around iron that becomes a magnet when electricity flows. Science is amazing! Stay curious! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!