Two point charges of equal magnitude are
7.5 cm apart. At the midpoint of the line
connecting them, their combined electric field
has magnitude of 45 N/C. Find the magnitude
of the charges.
Pls show me the complete calculation

Question

Two point charges of equal magnitude are
7.5 cm apart. At the midpoint of the line
connecting them, their combined electric field
has magnitude of 45 N/C. Find the magnitude
of the charges.
Pls show me the complete calculation

anonymous · Answer

first tell me what is the formula to calculate electric field due to a point charge?

anonymous · Answer

E=F/q=kq/r^2

anonymous · Answer

ok.. good.. tell me.. do you think the charges should be of same nature or opposite nature?? or both possible? doesn't matter?

anonymous · Answer

i think it has the same nature since the magnitude of electric field is high

anonymous · Answer

ok.. if the charges are of same nature.. then think the direction of the electric field due to each charge at the mid point? will they be same direction or opposite direction?

anonymous · Answer

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anonymous · Answer

i think same direction

anonymous · Answer

i dont know what happens at the center :-/ the radius is halved i guess?

anonymous · Answer

how is that?? the direction of electric field due to a positive charge is always AWAY from the charge!!

anonymous · Answer

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anonymous · Answer

okay

anonymous · Answer

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