A cylindrical conductor has resistance of R0 = 120 Ω. It has length L, radius of the cross section r, and resistivity ρ.    Part (a)  Express the resistance in terms of L, r, ρ.  R0 =   P L/π r2  This equation is incorrect      Part (b)  If the resistivity increases by a factor of 5, what would the value of the new resistance be, in ohms?  Rρ =600   Part (c)  If the resistivity was restored to its original value and instead the length of the conductor decreased by a factor of 5, what would the value of the new resistance be, in ohms?  Rl =

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A: Applying kirchoffs loop rule, 12-(10+20+10+10+10)*10^3 * I -24 =0   I=-12(60×103)=-2×10-4A=0.2mA

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.