Physics, asked by pvsn8602, 11 months ago

Two charges of 10uc and -40uc are placed 12 cm apart find the position of the point where the electric field is zero

Answers

Answered by ssara
2

Explanation:

when electric field is zero; from the formula --->

q/4π€r²= q/4π€r'²

9×10^9 ×10×10^-6/r² =9×10^9×40×10 ^-6/(0.12-r)²

10/r²=40/(0.12-r)²

0.0144+r²-0.24r/r²=4

r²-0.24r+0.0144=4r²

3r²+0.24r-0.0144=0

solve the quadratic equation to get the value of r

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