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Question

In a certain region of space with volume 0.2 m3, the electric potential is found to be 5 V throughout. The magnitude of electric field in this region is :

A
5 N/C
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B
1 N/C
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C
Zero
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D
0.5 N/C
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Solution

The correct option is C Zero
Using the expression :
E=dVdr

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.

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