A ductile metal wire has resistance R. What will be the resistance of this wire in terms of R if it is stretched to three times its original length, assuming that the density and resistivity of the material do not change when the wire is stretched? (Hint: The amount of metal does not change, so stretching out the wire will affect its cross-sectional area.)
A ductile metal wire has resistance R. What will be the resistance of this wire in terms of R if it is stretched to three times its original length, assuming that the density and resistivity of the material do not change when the wire is stretched? (Hint: The amount of metal does not change, so stretching out the wire will affect its cross-sectional area.)
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A ductile metal wire has resistance R. What will be the resistance
of this wire in terms of R if it is stretched to three times its original
length, assuming that the density and resistivity of the material do not
change when the wire is stretched? (Hint: The amount of metal does not
change, so stretching out the wire will affect its cross-sectional area.)
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