Two small balls,each having a negative charge | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) In a satellite,the condition is one of weightlessness,meaning the effective gravitational force $mg = 0$.Due to the electrostatic force of repulsi

Vedclass · Accepted Answer

$180^{\circ}, \frac{kQ^2}{4L^2}$

Vedclass · Answer

(A) In a satellite,the condition is one of weightlessness,meaning the effective gravitational force $mg = 0$.Due to the electrostatic force of repulsion between the two identical negative charges $Q$,the balls will push each other away until the strings are fully extended in opposite directions.Since the strings are of length $L$,the distance between the two balls becomes $2L$.The angle between the two strings is $180^{\circ}$.The tension $T$ in each string is balanced by the electrostatic force of repulsion $F_e$ between the two charges.Using Coulomb's Law: $F_e = \frac{k |Q_1 Q_2|}{r^2} = \frac{k Q^2}{(2L)^2} = \frac{k Q^2}{4L^2}$.Therefore,the tension $T = F_e = \frac{k Q^2}{4L^2} 	ext{ N}$.

Similar Questions

Two point charges $q_1 = 3 \mu \text{C}$ and $q_2 = -4 \mu \text{C}$ are placed at points $(2\hat{i} + 3\hat{j} + 3\hat{k})$ and $(\hat{i} + \hat{j} + \hat{k})$ respectively. Force on charge $q_2$ is . . . . . . $N$. (Take $\frac{1}{4\pi\epsilon_0} = 9 \times 10^9 \text{ SI Units}$)

$A$ charge $Q$ is divided into two parts $Q_1$ and $Q_2$. For a given distance $R$,the force between them is maximum when:

$A$ point charge $q$ is placed at a distance $d$ from one end of a thin non-conducting rod of length $L$ having a charge $Q$ uniformly distributed along its length,as shown in the figure. Find the magnitude of the electric force between them.

Three charges $+Q, q, +Q$ are placed respectively at distances $0, \frac{d}{2},$ and $d$ from the origin on the $x$-axis. If the net force experienced by the charge $+Q$ placed at $x = 0$ is zero,then the value of $q$ is:

Four charges equal to $-Q$ are placed at the four corners of a square of side length $a$,and a charge $q$ is at its centre. If the system is in equilibrium,the value of $q$ is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module