Two identical pendulum A and B are suspended from same point. bobs are given positive charges, with

English

Gujarati

Hindi

1. Electric Charges and Fields

easy

Two identical pendulum $A$ and $B$ are suspended from the same point. The bobs are given positive charges, with $A$ having more charge than $B$ . They diverge and reach at equilibrium, with $A$ and $B$ making angles $\theta _1$ and $\theta _2$ with the vertical respectively, Then

A

$\theta _1 = \theta _2$

B

$\theta _1 > \theta _2$

C

$\theta _1 < \theta _2$

D

Tension in $A$ is smaller than in $B$

Solution

According the conditions of coulomb forces, both the balls repel each other with a force

$\mathrm{F}_{\mathrm{e}}=\frac{\mathrm{q}_{1} \mathrm{q}_{2}}{4 \pi \varepsilon_{0} \mathrm{r}}$

Thus, forces $\mathrm{F}_{\mathrm{e}}$ and $\mathrm{mg}$ are identical on both the balls, hence in static equilibrium

$\theta_{1}=\theta_{2}.$

Standard 12

Physics

Share

Similar Questions

$(a)$ Explain the meaning of the statement ‘electric charge of a body is quantised’.

$(b)$ Why can one ignore quantisation of electric charge when dealing with macroscopic i.e., large scale charges?

easy

Check that the ratio $ke ^{2} / G m _{ e } m _{ p }$ is dimensionless. Look up a Table of Physical Constants and determine the value of this ratio. What does the ratio signify?

medium

A certain charge $Q$ is divided into two parts $q$ and $(Q-q) .$ How should the charges $Q$ and $q$ be divided so that $q$ and $(Q-q)$ placed at a certain distance apart experience maximum electrostatic repulsion?

medium

(JEE MAIN-2021)

Two charges $-\mathrm{q}$ each are fixed separated by distance $2\mathrm{d}$. A third charge $\mathrm{d}$ of mass $m$ placed at the midpoint is displaced slightly by $x (x \,<\,<\, d)$ perpendicular to the line joining the two fixed charged as shown in figure. Show that $\mathrm{q}$ will perform simple harmonic oscillation of time period. $T =\left[\frac{8 \pi^{3} \epsilon_{0} m d^{3}}{q^{2}}\right]^{1 / 2}$

hard

Consider two point charges of equal magnitude and opposite sign separated by a certain distance. The neutral point due to them

easy