A ball of mass 1, g and charge {10^{ - 8}},C moves from a point A . where potential is 600, volt to

English

Gujarati

Hindi

2. Electric Potential and Capacitance

medium

A ball of mass $1\, g$ and charge ${10^{ - 8}}\,C$ moves from a point $A$. where potential is $600\, volt$ to the point $B$ where potential is zero. Velocity of the ball at the point $B$ is $20\, cm/s$. The velocity of the ball at the point $A$ will be

$22.8\, cm/s$

$228\, cm/s$

$16.8\, m/s$

$168\, m/s$

Solution

(a) By using $\frac{1}{2}m(v_1^2 – v_2^2) = QV$
$==>$ $\frac{1}{2} \times {10^{ – 3}}\{ v_1^2 – {(0.2)^2}\} = {10^{ – 8}}(600 – 0)$
$==>$ ${v_1} = 22.8\,cm/s$

Standard 12

Physics

Distinguish difference between electric potential and electric potential energy

medium

On moving a charge of $20$ coulombs by $2 \;cm , 2 \;J$ of work is done, then the potential difference between the points is (in $volt$)

easy

(AIEEE-2002)

A particle of mass $m$ and charge $q$ is kept at the top of a fixed frictionless sphere. $A$ uniform horizontal electric field $E$ is switched on. The particle looses contact with the sphere, when the line joining the center of the sphere and the particle makes an angle $45^o$ with the vertical. The ratio $\frac{qE}{mg}$ is :-

hard

The ratio of momenta of an electron and an $\alpha$-particle which are accelerated from rest by a potential difference of $100\, volts$ is

easy

State which of the following is correct

easy

A ball of mass $1\, g$ and charge ${10^{ - 8}}\,C$ moves from a point $A$. where potential is $600\, volt$ to the point $B$ where potential is zero. Velocity of the ball at the point $B$ is $20\, cm/s$. The velocity of the ball at the point $A$ will be

Solution

Similar Questions

Distinguish difference between electric potential and electric potential energy

On moving a charge of $20$ coulombs by $2 \;cm , 2 \;J$ of work is done, then the potential difference between the points is (in $volt$)

The ratio of momenta of an electron and an $\alpha$-particle which are accelerated from rest by a potential difference of $100\, volts$ is

State which of the following is correct

Start a Free Trial Now