In a certain charge distribution, all points having zero potential can be joined by a circle S . Poi

English

Gujarati

Hindi

2. Electric Potential and Capacitance

easy

In a certain charge distribution, all points having zero potential can be joined by a circle $S$. Points inside $S$ have positive potential and points outside $S$ have negative potential. A positive charge, which is free to move, is placed inside $S$

A

It will remain in equilibrium

B

It can move inside $S$, but it cannot cross $S$

C

It must cross $S$ at some time

D

It may move, but will ultimately return to its starting point

Solution

(c) A free positive charge move from higher (positive) potential to lower (negative) potential. Hence, it must cross $S$ at some time.

Standard 12

Physics

Share

Similar Questions

Two insulated charged conducting spheres of radii $20\,cm$ and $15\,cm$ respectively and having an equal charge of $10\,C$ are connected by a copper wire and then they are separated. Then

easy

$64$ drops of mercury each charged to a potential of $10\,V$. They are combined to form one bigger drop. The potential of this drop will be…….$V$ (Assume all the drops to be spherical)

easy

Concentric metallic hollow spheres of radii $R$ and $4 R$ hold charges $Q _{1}$ and $Q _{2}$ respectively. Given that surface charge densities of the concentric spheres are equal, the potential difference $V ( R )- V (4 R )$ is

medium

(JEE MAIN-2020)

The give graph shown variation (with distance $r$ from centre) of

hard

(JEE MAIN-2019)

Three concentric metallic shells $A, B$ and $C$ of radii $a, b$ and $c (a < b < c)$ have surface charge densities $\sigma ,\, – \sigma $ and $\sigma $ respectively. then ${V_A}$ and ${V_B}$

hard