LEARNING PRACTICAL SCIENCE - ELCTRICAL

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SERIES AND PARALLEL CIRCUIT

In older days, if you had a string of festival lights and one bulb went out, the whole string no longer worked. do you know why?

This was because the bulbs were set up in a series circuit. Recently, companies have started producing lights and other electronics that are set up in parallel circuits. It needs more labor and wire to connect such thing but it solves the problem.

DO YOU KNOW IF BULBS GROW BRIGHTER IN SERIES OR PARALLEL?

Lets find this out with some experiment by creating series and parallel circuits.

YOU WILL NEED:
9V battery
Tape
Wires
2 identical flashlight bulbs

INSTRUCTIONS:

1. Tape strip of wire to the positive terminal of the 9V battery. Make sure the wire is touching the metal.
2. Tape another wire to the negative terminal of the 9V battery.
3. Wrap the end of the wire attached to the positive terminal around the light bulb’s metal screw cap.
4. Take another wire and wrap one end around the second light bulb.
5. Place the bottom of the light bulb attached to the positive terminal on the loose end of the other battery’s wire.
6. Place the bottom of the second light bulb on wire attached to the negative terminal.

You have created a series circuit. Take note of how brightly the bulbs shine. Now, let’s create a parallel circuit. First, remove the light bulbs from the system.

1. Take two wires and connect each of the ends around the wires coming off the positive terminal of the battery. It should look like the rungs of a ladder, but only connected on one side.
2. Wrap the loose ends of the wires around the metal screw cap of each light bulb.
3. Place the bottom of each of the light bulbs against the wires attached to the negative terminal.

BULBS WILL GROW BRIGHTER IN THE SECOND EXPERIMENT.




This simple experiment will teach you how to make series and parallel circuits.

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