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WAEC - Physics (1990 - No. 40)
What is the electric potential energy between two protons each of charge q and at a distance of r apart? (Permittivity of free space = εo)
4πε
o
q
2
r
qr/4πε
o
q/4πε
o
r
q
2
/4πε
o
r
q
2
/4πε
o
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