Investigating the factors which affect the flow of electricity

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Jenni Fisher 10.1

There are a number of ways in which resistance can be affected, some of which are the length of the wire. This can affect the resistance because if we increase the amount of wire, the current has to travel through more therefore increasing the resistance. Another way in which resistance can be affected is the thickness of the wire. If the wire is very thin, the current wont have as much room to pass through causing it to “struggle” through the wire, therefore causing ore resistance.

  Changing the metal, can also cause resistance, due to some metals are better conductors of electricity then others.

   To cause my resistance, I have chosen to change the length of the wire through out the experiment, can also cause resistance, due to some metals being better conductors of electricity then others.

   To cause my resistance, I have chosen to change the length of the wire through out the experiment.

Predictions:

  In this investigation, I am trying to find out whether or not increasing the wire will cause more or less resistance.

  I predict that the more we increase the wire the more the resistance will increase, causing the current to decrease.

  We can say: The shorter the wire the less resistance. The longer the wire the more resistance. Which means if we lengthen the wire less current will pass through.

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Scientific Knowledge:

 Resistance is the property of a substance that restricts the flow of electricity through it. The unit of resistance is the OHM.

    Resistance is measured in Ohm’s. A resistor has a resistance of 1 Ohm (1   ) if a voltage of one volt across it will push a current of 1 ampere through it.

  The more resistance a resistor has, the more volts are needed to push ach ampere through.

  If the voltage across a resistor and the current through it both has been measured, the resistance(r Ohms) can be calculated ...

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