2. A square of side 'B'has a charge q at each of its vertices. Determine the potential and electrice due to
these charges at the centre of the square
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Answer:
Diagonal of the cube face, d=
(
b
2
+b
2
)=b
2
Diagonal of cube l=
(
d
2
+b
2
)=b
3
Distance between center of cube and vertices, r=l/2=b
3
/2
Potential, v=8q/4πϵ
o
r=4q/
3
πϵ
o
b (8 due to presence of 8 charges at the vertices)
by symmetry of charge electric field, E=0.
Explanation:
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