If V is p.d across the potentiometer of length l, then the potential drop per unit length of wire is given by
(A) Vl
(B) Ir
(C) IR
(D) I/RI
If V is p.d across the potentiometer of length l, then the potential drop per unit length of wire is given by
(A) Vl
(B) Ir
(C) IR
(D) I/RI