Physics

Problem

The electric potential

V

as a function of distance

x

(in metre) is given by

V = (5x^2 + 10x - 9) \text{ volt.}

The value of electric field at

x = 1

m would be: (a) -20 volt/m (b) 6 volt/m (c) 11 volt/m (d) -23 volt/m