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qA=2.5C
qB=2C
rA=5m
rB=2m
Dit
ΔE..?
Jawab
ΔE
=EB-EA
=k(qB/rB²-qA/ra²)
=9x10∧9(2/2²-2.5/5²)
=9x10∧9(2/4-2.5/25)
=9x10∧9(0.5-0.1)
=9x10∧9(0.4)
=3.6x10∧9N/C