Four uniform wires having equal length 1 m each and resistance in the ratio 1:2:3:4 are connected together to form a square CDEF in that order i.e. CD, DE, EF, FC and resistance of wire CD is ‘r’. This loop surrounds a cylindrical region of circular cross section in which uniform magnetic field whose net flux depends on time according to relation  ϕ=40 t weber, where ‘t’ is in second. The magnetic field is perpendicular to the plane of square loop. Centre of circular cross section and square loop coincides.(V1 &V2 are ideal voltmeters)