Originally Posted by

**Stokoe10** could anyone help me with the following question.

appreciate any ones help.

The electrical resistance R of a wire of length l and cross-sectional area A (measured in m2) is given by the equation

R=pl/A

where ρ is a constant (known as resistivity) whose value depends on the metal used to make the wire. Note that Equation 1 is not introduced in S104 and you do not need to worry about the meaning of the symbols.

(i) Rearrange Equation 1 to make ρ the subject of the equation;

(ii) Use your answer to part (i) to find the units of ρ. You should express your answer in terms of the SI unit of resistance, and any other units in the answer should be SI base units (using letters and symbols to represent all units). Ensure that you show your working.