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Name: Zoe
Status: student
Age: 14
Location: N/A
Country: N/A
Date: 1999 


Question:
What happens to the electrons in a wire when connected to a power supply? How does this effect the resistance though different lenghs of wires?


Replies:
Electrons are free to move, hence this creates a current when a power supply is connected. The resistance of a wire is proportional to the length and inversely proportional to the cross sectional area, hence longer wires mean higher resistance and large cross-sectional areas translate to lower resistance.

Dr. Myron



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