 ## Bulbs And Batteries - 07.17

This exhibit demonstrates how different circuits work. You can experiment with different connections between bulbs.

There are different kind of electrical circuits. When two bulbs are connected after each other it’s a series connection. When two bulbs are beside each other it’s a parallel connection. A battery has current and voltage, when we use one bulb the voltage is 24V and the current 240mA. When we use two bulbs after each other the voltage at the battery is 24V and the current is 120mA. When we use two bulbs beside each other the voltage is 24V and the current 480mA. That’s the law of Ohm U=I*R (voltage = current * resistance)

1. Put the wires into the connection holes, try following the dots.
2. You can connect the bulbs after each other (series). The lights divide the voltage of the battery, the lights don’t burn bright.
3. You can connect the bulbs beside each other (parallel). The voltage from the battery is the same for each bulb, the lights burn bright.
4. Try some other connections.
5. Put the wires into the wire box.

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