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For copper p = 9.93 g/cm^3 and M= 63.5 g/mol. Assuming one free electron per copper atom, what is the drift velocity of electrons in a copper wire of radius 0.625 mm carrying a current of 3A?
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Question: People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques. Suppos ...
Question: In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is Tin=20^C and the temperature outside is Tout=0^C. The walls and uppermost ceiling of a typical house a ...
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