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What Factors Affect The Amount Of CurrentThat Can Flow Down A Wire

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Introduction

What Factors Affect The Amount Of Current That Can Flow Down A Wire

Aim:

I want to find out about factors and how they affect the amount of current that can flow down a wire.

Factors:

The factors that could affect my question are as follows and so is how they could do:

1/ no. Of volts: the volts we put into the wire the force there is that is pushing the current through so the higher the amount of current that does get through the wire. As shown in this formula: V=IR where V is voltage, I is current and R is resistance. So in the formula as voltage goes up so does current

2/ Resistance of the wire: The higher the resistance of the wire the less current that will flow through it Resistance is a force which opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. The circuit itself can resist the flow of particles if the wires are either very thin or very long. E.g. the filament across an electric bulb is quite thin as needs to resist the flow of particles for the bulb to glow.

3/ Length of the wire: the longer the wire the more resistance that is present so less current flows through.

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Middle

Temperature: All the readings will be taken within a short space of time and also I am only using 0.5 volts so the voltage should not cause the
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Conclusion

The Wires Cross sectional area:

I think that if the wire width is increased the resistance will decrease. This is because of the increase in the space for the electrons to travel through. Due to this increased space between the atoms there should be less collisions.

Temperature:

I think that if the wire is heated up the atoms in the wire will start to vibrate because of their increase in energy. This causes more collisions between the electrons and the atoms as the atoms are moving into the path of the electrons. This increase in collisions means that there will be an increase in resistance.

Material:

I think that the type of material of the wire will affect the amount of free electrons, which are able to flow through that wire. This is because the number of electrons depends on the amount of electrons in the outer energy shell of the atoms, so if there are more or larger atoms then there must be more electrons available. If the material has a high number of atoms there will be high numbers of electrons causing a lower resistance because of the increase in the number of electrons. Also if the atoms in the material are closely packed then the electrons will have more frequent collisions and the resistance will increase.

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