Question

What is voltage gradient of electric field?

Answer 1

Electric Field from Voltage. One of the values of calculating the scalarelectric potential (voltage) is that theelectric field can be calculated from it. The component of electric field in any direction is the negative of rate of change of the potential in that direction.

I hope it helps u dear ☺️......

Answer 2

gradient means difference 
so voltage gradient means voltage difference when the electric field is applied