does the resistance double as you double the length of a piece
of wire? Is this a trick question? Seems like it might be...
Yes, the resistance is proportional to the length. Therefore if
the length is doubled, the resistance is doubled. Interestingly,
the relationship of resistance to diameter is not so simple and
the frequency of the current affects the resistance (actually,
the impedance... have you met this term?). Yes, the resistance
of a wire is directly proportional to the length and inversely
proportional to the Area. Hence doubling the length of a wire
increases the resistance by a factor of two, doubling the area
would decrease the resistance by half. The proportionality
constant relating resistance to the length and area of a wire is
the resistivity of the wire. Resistance=Resistivity x
length/area The resistance of a wire, under nearly constant
temperature conditions, is directly proportional to length and
inversely proportional to the cross R = (rho)L/A R is the
resistance rho is the characterist