# Simple Electric Motor

Part of the Electricity Merit Badge Digital Resource Guide: [Introduction & Overview](https://merit-badge.university/merit-badges/electricity/guide/index.md)

*10. Hands-On Projects*

> **10b.** Make and run a simple electric motor (from a kit is acceptable, if approved by your counselor ahead of time).

A motor is one of the clearest examples of electricity turning into motion. Inside even a very simple motor, current creates magnetic forces that push a coil or armature around. That spinning motion is what powers fans, drills, toys, pumps, and countless tools.

## What a Simple Motor Needs

A basic classroom-style motor usually includes:

- **battery or power source**
- **wire coil or armature**
- **magnets**
- **supports or contacts**
- **a way to keep current reversing or reconnecting at the right times**

The exact design depends on whether you build from raw parts or use a kit, but the idea is the same: current in the coil interacts with a magnetic field and creates torque.

![Simple electric motor layout with a battery, wire coil, support contacts, magnets, and the direction of spin](https://ik.imagekit.io/doulacoop/tr:w-800/mbu-assets/merit-badges/electricity/guide/simple-motor-part-layout?v=89d445dd)

## What to Watch For When It Runs

If your motor spins, even slowly, you have proven the principle. If it struggles, that is normal. Very simple motors are sensitive to balance, friction, contact quality, and battery strength.

**Keys to a successful simple motor** — Small details matter

- [ ] **Keep the coil balanced** so it can rotate freely.
- [ ] **Use clean contacts** so current reaches the coil reliably.
- [ ] **Place the magnets correctly** for strong interaction with the coil.
- [ ] **Use a fresh battery** because weak current can make the motor stall.
- [ ] **Reduce friction** anywhere the coil rests or turns.

## What the Motor Teaches You

This project connects directly to [Req 3 — Build an Electromagnet](https://merit-badge.university/merit-badges/electricity/guide/req3/). In both cases, current creates magnetic force. The difference is that a motor uses that force in a repeating pattern so the motion continues instead of stopping after one pull.

> **Safety First!**
>
> Use only low-voltage project materials and be careful with spinning parts, sharp wire ends, and hot spots from prolonged battery contact. Disconnect the battery when adjusting the build.

[Science Buddies — Build a Simple Electric Motor](https://www.sciencebuddies.org/science-fair-projects/project-ideas/Elec_p009/electricity-electronics/build-a-simple-electric-motor): A step-by-step project explanation of how a simple motor works and what adjustments help it spin.

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- Previous: [Battery, Switch, and Load](https://merit-badge.university/merit-badges/electricity/guide/req10a/index.md)
- Next: [Build a Rheostat](https://merit-badge.university/merit-badges/electricity/guide/req10c/index.md)