GATE ME Question of the Day 26-03-2019

Question of the Day

GATE 2007 ME Question No. 4

The partial differential equation $\frac{\partial^{2} φ}{\partial x^{2}} + \frac{\partial^{2} φ}{\partial y^{2}} + (\frac{\partial φ}{\partial x}) + (\frac{\partial φ}{\partial y}) = 0$ has