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Question
In a region of constant potential ______.
- the electric field is uniform
- the electric field is zero
- there can be no charge inside the region
- the electric field shall necessarily change if a charge is placed outside the region
Options
b and c
a and c
b and d
c and d
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Solution
b and c
Explanation:
We know, the electric field intensity E and electric potential V are dV related as E = – dV/dr
or we can write |E| = ΔV/Δr
The electric field intensity E and electric potential V are related as E = 0 and for V = constant, dV/dr = 0 this imply that electric field intensity E = 0.
If some charge is present inside the region then electric field cannot be zero at that region, for this V = constant is not valid.
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