Resposta :
6cm = 0,06m = 6*10^-2 metros
5*10^-5 Ω -------------------------- 1 metro
x -----------------------------------6*10^-2 metros
x = 30 * 10^-7
x = 3 * 10^-6Ω
U = R * i
U = 3*10^-6 * 10³
U = 3 * 10^-3 Volts
************
U = 3mV
************
5*10^-5 Ω -------------------------- 1 metro
x -----------------------------------6*10^-2 metros
x = 30 * 10^-7
x = 3 * 10^-6Ω
U = R * i
U = 3*10^-6 * 10³
U = 3 * 10^-3 Volts
************
U = 3mV
************