0 votes 0 votes In a source free region in vacuum, if the electrostatic potential $\varphi = 2x^{2} + y^{2} + cz^{2},$ the value of constant ܿ$c$ must be _______. Electromagnetics gate2015-ec-2 numerical-answers electromagnetics + – Milicevic3306 asked Mar 27, 2018 recategorized Nov 15, 2020 by soujanyareddy13 Milicevic3306 16.0k points 115 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.