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Electric question
A bar of silcon is 4cm long with a circular cross section. If the resistance of the bar is 240(ohms.) at room temperature, what is the cross-sectional radius of the bar?
Seems like a noob question.
Seems like a noob question.
They've given you the material, that's a big pointer about what equation you'll need. Can you think of a material property to do with the question?
Resistivity.
One can look up the value of resistivity for silicon at room temperature.
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