Salma Ahmed
English Lit. GCSE Student
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GCSE Physics: Resistance of a Wire
- Words:
- 2639
- Submitted:
- Thu Oct 16 2008
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Have a little read: ... GCSE Triple Science: Physics Coursework Resistance: An electron travelling through the wires and loads of the external circuit encounters resistance. Resistance is the hindrance/restraint to the flow of charge. For an electron, the journey from terminal to terminal is not a direct route. In fact, it is a zigzag path which results from countless collisions with fixed atoms within the conducting material. The electrons encounter resistance - a hindrance to their movement. While the electric potential difference established between the two terminals encourages the movement of charge, it is resistance which discourages it; simply meaning that resistance is pretty much a "speed hump" for ongoing electrons. The rate at which charge flows from terminal to terminal is the result of the combined effect of these two quantities. Variables Effecting Resistance The flow of charge through wires is often compared to the flow of water through pipes. The resistance to the flow of charge
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