Allowing It To Flow Through Everything That She Does Science Fair Experiments That Win Awards – Project #12 – Electrical Conductors

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Science Fair Experiments That Win Awards – Project #12 – Electrical Conductors

Objective

This is one of those science fair experiments where you’re testing different materials to find out which conducts electricity better.

 

introduction

Electricity has existed since the ancient Greeks rubbed amber and fur together, resulting in static electricity.

The first notable achievement in this field was made by Alessandro Volta, an Italian physicist who developed the first circuit in 1800. He also showed that a circuit must be closed or complete for electricity to flow through it. Science fair experiments can be conducted using circuits that demonstrate this principle.

Volta’s student, George Simon Ohm, made the next discovery in 1826. He observed that some substances do not allow electricity to pass freely. In other words, they resisted the flow of electricity through them. This resistance of a circuit is measured by a unit called ohms and abbreviated by the Greek letter omega (?).

Some materials allow electricity to move through them while others do not so well. Materials that allow electricity to flow through them are called conductive materials. Materials that resist the passage of electricity through them are called insulators. Conductive materials have low resistance while insulators have high resistance. In science fair experiments, we can use copper wire as conductor and plastic coating as insulator.

In this experiment you will be tested on different materials, whether they are insulators or conductors. You figure that out by adding different materials to the circuit and noting how bright or dim the bulb is. For this purpose you will create your own light bulb circuit.

 

Material

  • Paper clips, string, plastic, aluminum foil, rubber bands, etc…
  • Battery (6V)
  • 3 pieces of wire leads with alligator clips attached to both ends
  • Light bulb (6V) connected wires
  • An insulating surface such as a chopping board that is flat

procedure

 

  1. Create a circuit to test the material.
  2. Connect either terminal of the battery with a wire. One end of the wire which is black should be connected to the (-) terminal and its free end should be connected to the bulb lead.
  3. One end of the red colored wire should be connected to the (+) terminal and the free end should be left for connecting various materials.
  4. Connect the other lead of the bulb to one end of the yellow wire and leave the end free to connect various materials to it.
  5. Now, the red and yellow wires will have a free end each. This is where the test material will be added.
  6. In science fair experiments, data is always recorded. So draw a table with three columns to write the type of material, source of material and luminance of the bulb.
  7. Now connect the first piece of material to the circuit.
  8. Write down whether the bulb lights up and how bright it is. Continue for all other content.
  9. You can connect an ohm meter and write the reading in the table.
  10. Now make another table with three columns to write the names of conductors, bad conductors and insulators.

Note that when the bulb is bright, the material has high conductivity and low resistance and should be written in the conductor column. When the bulb is dim, the material has low conductivity and the poor conductor goes into the column. When the bulb does not light, there is no conductivity and high resistance, and the material must be written in the insulator column. Now that you’re excited to give this experiment a go, your next step is to download your free copy of “Easy Steps to Award-Winning Science Fair Projects” from the link below right now.

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