Sorry, If I couldn't reach out for the actual meaning of my question. Its my bad english. Q : What's the exact relationship between charge and the mass? I found that charge never exists without mass. It should have any amount of tiny mass associated with it to exist. So, why is it so? If there is any experimental proof to state me wrong about this, please mention it, because I didn't hear of it anywhere. There is a relationship between matter and energy, right? So, similarly, there must be some relationship between mass and charge. We can find mass without charge, but not charge without mass. Not even in the Hawking radiation above black hole that we find some charge without mass. Why is it So? Why aren't we able to propose a theory for that? If already proposed please let me know it.