Four resistances 40 Ω, 60 Ω, 90 Ω and 110 Ω make the arms of a quadrilateral ABCD. Across AC is a battery of emf 40 V and internal resistance negligible. The potential difference across BD in V is ____. 60 Ω 90 Ω and 110 Ω make the arms of a quadrilateral ABCD. Across [...]