We have the Voltage v = 80 volts
Current i = 40 amps
We need to find the resistance r
The Ohm's law states that the current in any circuit is directly proportional to the voltage and inversely proportional to the resistance
which gives the formula
[tex] i=\frac{v}{r} [/tex]
or
[tex] r=\frac{v}{i} [/tex]
lets plug in our values
[tex] r= \frac{80}{40} [/tex]
[tex] r=2 [/tex]
Resistance is measured in ohm denoted by the symbol Ω
Hence the answer is 2Ω or 2 ohms