Electric Current
A piece of copper wire has a diameter of 0.25mm. The current in the wire is 3.5mA. You are provided with some useful information about copper.
1m^3 of copper has a mass of 8.9x10^3kg
54kg of copper contains 6.0x10^26 atoms.
In copper, there is roughly one electron liberated from each copper atom.
i. show that the electron number density n for copper is about 10^29m^-3.
ii. Calculate the mean drift velocity of the electrons. Assume the copper wire to be cylindrical.
HELP!??
1m^3 of copper has a mass of 8.9x10^3kg
54kg of copper contains 6.0x10^26 atoms.
In copper, there is roughly one electron liberated from each copper atom.
i. show that the electron number density n for copper is about 10^29m^-3.
ii. Calculate the mean drift velocity of the electrons. Assume the copper wire to be cylindrical.
HELP!??
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