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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

**Electricity and Magnetism**

The relationship between electricity and magnetism, including how electromagnetism and induction work.

**Electromagnets**

When an electric current flows in a wire it creates a magnetic field around the wire.

By winding the wire into a coil we can strengthen the magnetic field.

We can make an electromagnet stronger by:

• wrapping the coil around an iron core

• adding more turns to the coil

• increasing the current flowing through the coil.

**The magnetic field of an electromagnet**

The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around. Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.

**Magnetic Field around a current carrying wire**

Determine the direction of the field using the right-hand grip rule.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

More Science Worksheets

Math Worksheets

The relationship between electricity and magnetism, including how electromagnetism and induction work.

When an electric current flows in a wire it creates a magnetic field around the wire.

By winding the wire into a coil we can strengthen the magnetic field.

We can make an electromagnet stronger by:

• wrapping the coil around an iron core

• adding more turns to the coil

• increasing the current flowing through the coil.

The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around. Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.

Determine the direction of the field using the right-hand grip rule.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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