we would like to produce a 1000 ohm resistor from boron carbide having electrical conductivity (σ) = 2 ohm-1 .cm-1 and diameter of 0.01cm.1) determine the length of fiber that required .2) How much...

we would like to produce a 1000 ohm resistor from boron carbide having electrical conductivity (σ) = 2 ohm-1 .cm-1 and diameter of 0.01cm. 1) determine the length of fiber that required . 2) How much the current density that passes through this resistor when 220 volt applied .