In a certain region of space with volume $$0.2 m^3$$, the electric potential is found to be $$5 V$$ throughout. The magnitude of electric field in this region is :
Correct option is D. zero
Using the expression:
$$E=-\dfrac{dV}{dr}$$
Since the potential 'V' is constant, change in potential $$dV$$ is zero for any displacement $$dr$$.
Hence the electric field will be zero in the region.