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WAEC - Physics (1996 - No. 50)
The diagram above illustrates an isolated metal sphere carrying charge W in a medium whose permittivity is so. The magnitude of the electric field intensity at P can be expressed as
Q
2
/(4πε
o
r
2
)
Q/(4πε
o
r
2
)
Q/(4πε
o
r)
Q
2
/(4πε
o
r
2
)
Q/(4πε
o
r)
2
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