Two identical point charges are placed at a separation of d . P is a point on line joining charges,

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1. Electric Charges and Fields

hard

Two identical point charges are placed at a separation of $d$. $P$ is a point on the line joining the charges, at a distance $x$ from any one charge. The field at $P$ is $E$, $E$ is plotted against $x$ for values of $x$ from close to zero to slightly less than $d$. Which of the following represents the resulting curve

Solution

(d) At mid point, $E = 0$
Before mid point, $E$ is positive. This is maximum near the charge and decreases towards mid point.
After mid point, $E$ is negative, The curve crosses $x$-axes at $x$-axis at $x = d/2$. From centre to end, $E$ decreases.
The variation is shown by curve.

Standard 12

Physics

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medium

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hard

(JEE MAIN-2013)

Solution

Similar Questions

An oil drop carries six electronic charges, has a mass of $1.6 \times 10^{-12} g$ and falls with a terminal velocity in air. The magnitude of vertical electrical electric field required to make the drop move upward with the same speed as was formely moving is ……..$kN/C$

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