The representation of l1 perpendicular to l2 is
The representation of l1 parallel to l2 and l3 perpendicular to l2 is respectively,
Two resistors of the same material and cross section area but different lengths L1 & L2 have their resistances in the ratio
In a circuit two resistances of the same material and cross section area but different lengths L1 and L2 are kept in series. Find the length of the equivalent resistance if it's made of the same material and same cross section area.