The two plates $X $ and $Y$ of a parallel plate capacitor of capacitance $C$ are given a charge of amount $Q$ each. $X$ is now joined to the positive terminal and $Y$ to the negative terminal of a cell of $emf$ $E = Q/C$.
Diffcult
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
- 1Three 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 ${V_B}$View Solution
- 2If some charge is given to a solid metallic sphere, the field inside remains zero and by Gauss's law all the charge resides on the surface. Now, suppose that Coulomb's force between two charges varies as $1 / r^{3}$. Then, for a charged solid metallic sphereView Solution
- 3As in figure shown, if a capacitor $C$ is charged by connecting it with resistance $R$, then energy is given by the battery will beView Solution
- 4Three capacitors each of $6\,\mu F$ are available. The minimum and maximum capacitances which may be obtained areView Solution
- 5View SolutionIn the circuit shown in figure, four capacitors are connected to a battery. A capacitor is connected to a battery. The force of attraction between the plates when the separation between them is halved
- 6A spherical metal shell $A$ of radius $R_A$ and a solid metal sphere $B$ of radius $R_B\left( < R_A\right)$ are kept far apart and each is given charge ' $+Q$ '. Now they are connected by a thin metal wire. ThenView Solution
$(A)$ $E_A^{\text {lnside }}=0$
$(B)$ $Q_A > Q_B$
$(C)$ $\frac{\sigma_A}{\sigma_B}=\frac{R_B}{R_A}$
$(D)$ $E_A^{\text {on sulface }} < E_B^{\text {on uurface }}$
- 7Two capacitors of $10\,\mu \,F$ and $20\,\mu \,F$ are connected in series with a $30\,V$ battery. The charge on the capacitors will be, respectivelyView Solution
- 8In 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 $S$View Solution
- 9This questions has statement$-1$ and statement$-2$. Of the four choices given after the statements, choose the one that best describe the two statements.View Solution
An insulating solid sphere of radius $R$ has a uniformly
positive charge density $\rho$. As a result of this uniform charge distribution there is a finite value of electric potential at the centre of the sphere, at the surface of the sphere and also at a point out side the sphere. The electric potential at infinite is zero.Statement$ -1$ : When a charge $q$ is take from the centre of the surface of the sphere its potential energy changes by $\frac{{q\rho }}{{3{\varepsilon _0}}}$
Statement$ -2$ : The electric field at a distance $r(r < R)$ from centre of the sphere is $\frac{{\rho r}}{{3{\varepsilon _0}}}$
- 10The equivalent capacitance between the points $A$ and $B$ in the given diagram isView Solution
