How to Make A Transformer

1. How to Make A Transformer Christina, Susanne, and Mary Clare

2. Problem: How do you make a transformer?

3. What do we need to know? • TRANSFORMERS: A transformer is a device that increases or decreases voltage. For example, when you charge your computer you use a transformer that decreases the voltage. WHAT A TRANSFORMER CONSISTS OF: A transformer consists of two separate coils of wire wrapped around an iron core. One of the coils is called the primary coil. This coil is connected to a circuit where an alternating current flows. The other coil is called the secondary coil. This coil is connected to a separate circuit that doesn’t have a voltage source. STEP-UP TRANSFORMERS: A step-up transformer is a transformer that increases voltage. STEP-DOWN TRANSFORMER: A step-down transformer is a transformer that decreases voltage.

4. Analyze and Conclude • What happens when every thing is connected? When everything was connected, the amp meter needle moved back and forth, showing that there was a flow of electricity going through the wires. • Why does this happen? A transformer consists of two separate coils of wire wrapped around an iron core. There are two different wires, the primary coil and the secondary coil. The primary coil creates a magnetic field, which then goes to the secondary coil. Then, both coils have electricity even though they are not connected. The electricity then travels through the circuit and to the amp meter. What happens when the battery was disconnected? When the battery was disconnected, the amp meter needle stopped moving, showing that there was no more electricity flowing. Why does this happen? This happened because the battery produced all the electricity flowing through the wires and when we disconnected the wires from the battery, there was no way for the electricity to flow through the wires.