In a certain reglon 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 ______ $N/C$
A$5$
B$0$
C$0.5$
D$1$
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B$0$
b Potential is constant throughout the volume
$\therefore$ Electric field is zero.
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