Energy Efficiency World

I n order for electricity to travel to where we need it, there must be a complete circuit of electricity. A complete circuit is like a circle. Electricity is produced at one place, travels around the circuit, and returns to the starting place. Go with the Flow Go

Build a Circuit You can build an electrical circuit of your own, using a battery instead of a power plant generator as the electricity source.

1. Get a D-cell battery, a 1.2-volt light bulb with a matching E-10 light bulb base, electrical or masking tape, and two pieces of insulated wire with 1 inch stripped on each end. (An adult should strip the wire for you.) 2. Predict what will happen if you attach only one wire from the battery to the bulb. Now, predict what will happen if you add another wire from the bulb to the battery. ________________________________________ ________________________________________ ________________________________________ ________________________________________ 3. Look at the picture of the battery and bulb on this page. Use your materials to build a circuit like the one in the picture. Were your predictions correct? If not, explain why. ________________________________________ ________________________________________ ________________________________________

4. Suppose you wanted to build a circuit with ten light bulbs. What would you have to do to be sure all the bulbs would light up? ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ 5. When you use a lamp, you use a switch to turn it on and off. What does the switch do to the circuit that brings electricity to the lamp? ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________ ________________________________________

7