A relation between potential difference V, current I and resistance R is well-known for metallic conductors.
(i) Write this relation.
(ii) Rearrange the relation to make I the subject and give the resulting expression.
(iii) Rearrange the same relation to make R the subject and give the resulting expression.
(iv) Show by dimensional analysis that the expressions obtained in parts (ii) and (iii) are dimensionally consistent.