Three identical dipoles are arranged as shown below. What will be the net electric field at $M$
$\frac{{kp}}{{{x^3}}}$
$\frac{{2kp}}{{{x^3}}}$
Zero
$\frac{{\sqrt 2 kp}}{{{x^3}}}$
The charge $q$ on a capacitor varies with voltage as shown in figure. The area of the triangle $AOB$ is proportional to
Three plates of common surface area $A$ are connected as shown. The effective capacitance will be
Two point charges $+q$ and $-q$ are held fixed at $(-d, 0)$ and $(d, 0)$ respectively of a $x -y$ coordinate system. Then
A total charge $Q$ is broken in two parts $Q_1$ and $Q_2$ and they are placed at a distance $R$ from each other. The maximum force of repulsion between them will occur, when
Three capacitors $1, 2$ and $4\,\mu F$ are connected in series to a $10\, volts$ source. The charge on the plates of middle capacitor is