MCQ
Three plates of common surface area A are connected as shown. The effective capacitance will be
  • A
    $\frac{\varepsilon_0 \mathrm{~A}}{\mathrm{~d}}$
  • B
    $\frac{3\varepsilon_0 A}{d}$
  • C
    $\frac{3}{2} \cdot \frac{\varepsilon_0\mathrm{~A}}{\mathrm{~d}}$
  • $\frac{2 \varepsilon_0 A}{d}$

Answer

Correct option: D.
$\frac{2 \varepsilon_0 A}{d}$
(d) $\frac{2 \varepsilon_0 A}{d}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Four charges equal to – Q are placed at the four corners of a square and a charge q is at its centre. If the system is in equilibrium the value of q is
Which of the following is used in optical fibers?
If a glass rod is rubbed on silk cloth and then brought near the bits of paper it $........$ then.
The velocity factor of a transmission line x. If dielectric constant of the medium is 2.6, the value of x is
A lens of focal power 0.5 D is
In a fluorescent lamp choke (a small transformer) $100 \;\mathrm{V}$ of reverse voltage is produced when the choke current changes uniformly from $0.25 \;\mathrm{A}$ to $0\;\mathrm{A}$ in a duration of $0.025 \;\mathrm{ms} .$ The self-inductance of the choke (in $\mathrm{mH})$ is estimated to be
The gap between the plates of a parallel plate capacitor of area $A$ and distance between plates $d$, is filled with a dielectric whose permittivity varies linearly from ${ \varepsilon _1}$ at one plate to ${ \varepsilon _2}$ at the other. The capacitance of capacitor is
In Thomson's experiment to measure e/ m of electron, the electric and the magnetic fields are.
In a photoelectric effect experiment the threshold wavelength of incident light is $380\, nm$, If the wavelength of the incident light is $260\,nm$, the maximum kinetic energy of emitted electrons will be: .............. $eV$

Given $E$ (in $eV$) $ = \frac{{1237}}{{\lambda \left( {in\,nm} \right)}}$

If $n$ represents the actual number of deflections in a converted galvanometer of resistance $G$ and shunt resistance $S$. Then the total current I when its figure of merit is $K$ will be