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CUET
Physics
Electric Charges and Fields
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b
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d
Let electric field is zero at distance x from q1
⇒ $\frac{kq_1}{x^2} = \frac{kq_2}{(20-x)^2}$
⇒ $\frac{4}{x^2} = \frac{9}{(20-x)^2}$
⇒ $\frac{2}{x} = \pm \frac{3}{20-x}$
⇒ 40-2x = $\pm$ 3x
x = 8 cm from q1