Two point charges q and 4q are held at separation r.At what distance the electric field due to them is zero
manikanta , 11 Years ago
Grade 12
Electrostatics> lines-of-force...
1 Answers
Sher Mohammad
Last Activity: 10 Years ago
kq/x^2=k4q/(r-x)^2
r^2+x^2-2rx=4x^2
3x^2+2rx-r^2=0
x=-2r+sqrt(4r^2+12r^2)/6= -2r+4r/6=1/3r
sher mohammad
b.tech, iit delhi
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