In a certain region of space with volume $0.2 ext{ m}^3$, the electric potential is found to be $5 ext{ V}

Question

In a certain region of space with volume $0.2 	ext{ m}^3$, the electric potential is found to be $5 	ext{ V}$ throughout. The magnitude of electric field in this region is :

Accepted Answer

Since electric potential is constant throughout the region, the electric field $E = -\frac{dV}{dr} = 0$.

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