Two metal pieces having a potential difference of $800 \;V$ are $0.02\; m$ apart horizontally. A particle of mass $1.96 \times 10^{-15} \;kg$ is suspended in equilibrium between the plates. If $e$ is the elementary charge, then charge on the particle is
Medium
Download our app for free and get started
સંતુલન માટે $QE = Mg ⇒ (Ne)E = Mg$
$N\,\, = \,\,\frac{{Mg}}{{eE}}\,\,\,\left\{ {\left. {E\,\, = \,\,\frac{V}{d}} \right\}} \right.\,\,$
$ = \,\,\frac{{1.96\,\, \times \,\,{{10}^{ - 15}}\, \times \,\,10\,}}{{1.6\,\, \times \,\,{{10}^{ - 19}}\,\, \times \,\,\left( {800/0.02} \right)}}\,\, = \,\,3\,$
$\,\therefore \,\,Q\,\, = \,\,Ne\,\, = \,\,3e$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1A pellet carrying charge of $0.5\, coulombs$ is accelerated through a potential of $2,000\, volts$. It attains a kinetic energy equal toView Solution
- 2The electric potential in volts due to an electric dipole of dipole moment $2 \times 10^{-8}$ coulomb-metre at a distance of $3 \,m$ on a line making an angle of $60^{\circ}$ with the axis of the dipole is ..........View Solution
- 3A capacitor is made of a tlat plate of area $A$ and a second plate having a stair-like structure as shown in figure. If the area of each stair is $\frac{A}{3}$ and the height is $\mathrm{d}$, the capacitance of the arrangement is:View Solution
- 4A parallel plate condenser is filled with two dielectrics as shown. Area of each plate is $A\;metr{e^2}$ and the separation is $t$ $metre$. The dielectric constants are ${k_1}$ and ${k_2}$ respectively. Its capacitance in farad will beView Solution
- 5Two capacitors $C_1 = 4\ \mu F$ and $C_2 = 2\ \mu F$ are charged to same potential $ V = 500\ Volt$, but with opposite polarity as shown in the figure. The switches $S_1$ and $S_2$ are closed.View Solution
- 6Figure shows a solid metal sphere of radius $‘a’$ surrounded by a concentric thin metal shell of radius $2a$ . Initially both are having charges $Q$ each. When the two are connected by a conducting wire as shown in the figure, then amount of heat produced in this process will beView Solution
- 7The given figure shows, two parallel plates $A$ and $B$ of charge densities $+\sigma$ and $-\sigma$ respectively. Electric intensity will be zero in regionView Solution
- 8Four capacitors are connected as shown in the equivalent capacitance between the points $P$ and $Q$ is.......$\mu F$View Solution
- 9$64$ drops each having the capacity $C$ and potential $V$ are combined to form a big drop. If the charge on the small drop is $q$, then the charge on the big drop will beView Solution
- 10A particle $A$ has charge $ + q$ and a particle $B$ has charge $ + \,4q$ with each of them having the same mass $m$. When allowed to fall from rest through the same electric potential difference, the ratio of their speed $\frac{{{v_A}}}{{{v_B}}}$ will becomeView Solution