Electric potential at surface of an atomic nucleus (z=50) of radius 9 × 10^{-13} mathrm{~cm} is ___

English

Gujarati

Hindi

2. Electric Potential and Capacitance

hard

The electric potential at the surface of an atomic nucleus $(z=50)$ of radius $9 \times 10^{-13} \mathrm{~cm}$ is ________$\times 10^6 \mathrm{~V}$.

A

$10$

B

$9$

C

$7$

D

$8$

(JEE MAIN-2024)

Solution

$ \text { Potential }=\frac{k Q}{R}=\frac{k \cdot Z e}{R} $

$ =\frac{9 \times 10^9 \times 50 \times 1.6 \times 10^{-19}}{9 \times 10^{-13} \times 10^{-2}} $

$ =8 \times 10^6 \mathrm{~V}$

Standard 12

Physics

Share

Similar Questions

A uniform electric field of $400 \,v/m$ is directed $45^o$ above the $x$ – axis. The potential difference $V_A – V_B$ is -…..$V$

hard

A conductor with a positive charge

easy

An electric field $\vec E\, = (25 \hat i + 30 \hat j)\,NC^{-1}$ exists in a region of space. If the potential at the origin is taken to be zero then the potential at $x\, = 2\, m, y\, = 2\, m$ is……$volt$

medium

(JEE MAIN-2015)

Consider two conducting spheres of radii ${{\rm{R}}_1}$ and ${{\rm{R}}_2}$ with $\left( {{{\rm{R}}_1} > {{\rm{R}}_2}} \right)$. If the two are at the same potential, the larger sphere has more charge than the smaller sphere. State whether the charge density of the smaller sphere is more or less than that of the larger one.

medium

For a uniformly charged thin spherical shell, the electric potential $(V)$ radially away from the center $(O)$ of shell can be graphically represented as

medium

(JEE MAIN-2023)