The resistivity of a 18.0 m long wire is 3.76E-8 Ω.m and its cross sectional area is 6.52E-6 m2. If the wire carries a current of 1.44 A, what is the voltage across the wire?
R = ( rho x l)/A Where: R is the resistance, rho the resistivity, l the length and A the area Resiatance of wire = (3.76 x 10^-8 x 18)/6.52 x 10^-6 R = 0.1038 Ohms Voltage across wire = current through wire x resistance of wire V = I x R V = 1.44 x 0.1038 V = 0.14947 V = 0.15 Volts
