Twenty seven drops of same size are charged at 220, mathrm{~V} each. They combine to form a bigger d

English

Gujarati

Hindi

2. Electric Potential and Capacitance

medium

Twenty seven drops of same size are charged at $220\, \mathrm{~V}$ each. They combine to form a bigger drop. Calculate the potential of the bigger drop. (In $\mathrm{~V}$)

A

$1980$

B

$1320$

C

$1520$

D

$660$

(NEET-2021)

Solution

${V}_{\mathrm{B}}=\mathrm{N}^{2 / 3}\, \mathrm{~V}_{\mathrm{S}}$

$\mathrm{V}_{\mathrm{B}}=(27)^{2 / 3} \times 220$

$\mathrm{~V}_{\mathrm{B}}=9 \times 220$

$=1980\, \mathrm{~V}$

Standard 12

Physics

Share

Similar Questions

The charge given to a hollow sphere of radius $10\, cm$ is $3.2×10^{-19}\, coulomb$. At a distance of $4\, cm$ from its centre, the electric potential will be

easy

Find the potential $V$ of an electrostatic field $\vec E = a\left( {y\hat i + x\hat j} \right)$, where $a$ is a constant.

easy

Equal charges are given to two spheres of different radii. The potential will

easy

Consider the points lying on a straight line joining two fixed opposite charges. Between the charges there is

easy

$A$ and $C$ are concentric conducting spherical shells of radius $a$ and $c$ respectively. $A$ is surrounded by a concentric dielectric of inner radius $a$, outer radius $b$ and dielectric constant $k$. If sphere $A$ is given a charge $Q$, the potential at the outer surface of the dielectric is.

medium