Question

A point charge of $10\, \mu C$ is placed at the origin At what location on the $X$-axis should a point charge of $40 \, \mu C$ be placed so that the net electric field is zero at $x=2 \, cm$ on the $X$-axis?

• A. $x=-4 \,cm$
• B. $x=4 \, cm$
• C. $x=8 \,cm$
• D. $x=6 \,cm$

Answer 1

Answer: (D)

$x=6 \,cm$

Answer 2

The correct answer is (D) : $x=6 \,cm$

EP​=22K×10​−(x0​−2)2K×40​=0
21​=x0​−22​
x0​−2=4
x0​=6cm