Just after two identical point charges are released when they are a distance D apart in outer space, they have an acceleration a. If you release them from a distance D/2 instead, their acceleration will be? a) a/4 b) a/2 c) 2a d) 4a

Physics · College · Thu Feb 04 2021

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Electrostatic force 
(F) = kq1 q2 / r²

So ,  force is inversely proportional to distance

a= 1/r² 

a1/ a2 = r²1/ r²2 
= ( d/2)²/(d) 
a1/ a2 = 1/4

So, the new acceleration will be four times the old acceleration

Answer is (d) 4a .

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