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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:

1. 0.5 N/C
2. 1 N/C
3. 5 N/C
4. zero

Correct answer: zero

Solution

The electric field is the spatial rate of change of electric potential. Since the potential is constant (5 V) throughout the region, there is no change in potential, and hence the electric field is zero.

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