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pallavi pradeep bhardwaj Grade: 12
        

Two charges2*10^-6c and 1*10^-6c are placed at a seperation of 10 cm.Where should a third charge be placed such that it experiences no net force due to these charges?

7 years ago

Answers : (1)

askiitian.expert- chandra sekhar
10 Points
										

Hi Pallavi,


If both are positive charges then the third charge should be placed on the line joining the two charges.


it should be in between the two charges


F1=F2


2*q/ r2=1*q/(10-r)2


r2=2(10-r)2


r2= 200 + 2 r2 - 40r


r2 - 40r + 200 = 0


r = [40 ± √(1600-800)]/2


   = [40 - √(1600-800)]/2  since the point should be in between


   = 20 - 10√2


   = 5.86 cm


third charge should be placed at 5.86 cm from 2*10-6 C charge.

7 years ago
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