Question

The electric potential V at any point O (x, y, z all in metres) in space is given by V=4x2
volt. The electric field at the point (1m, 0,2m) in volt/metre is9 along which direction​

Answer 1

E

=−[

i

^

∂x

∂V

+

j

^

∂y

∂V

+

k

^

∂z

∂V

]

E

=−[

i

^

(8x)]

E

(1,0,2)

=−8

i

^

So electric field is 8 along negative x-axis.