Electrostatics

Related Questions

• An uncharged sphere of metal is placed in between two charged plates as shown. The lines of force look like

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• Two small spherical balls each carrying a charge $Q = 10\mu C$ (10 micro-coulomb) are suspended by two insulating threads of equal lengths 1m each, from a point fixed in the ceiling. It is found that in equilibrium threads are separated by an angle ${60^o}$ between them, as shown in the figure. What is the tension in the threads (Given: $\frac{1}{{(4\pi {\varepsilon _0})}} = 9 \times {10^9}Nm/{C^2}$)

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• Two small conducting spheres of equal radius have charges \[ + 10\mu C\] and \[ - 20\mu C\] respectively and placed at a distance \[R\] from each other experience force \[{F_1}\]. If they are brought in contact and separated to the same distance, they experience force \[{F_2}\]. The ratio of \[{F_1}\] to \[{F_2}\] is

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• When a charge of 3 coulombs is placed in a uniform electric field, it experiences a force of 3000 Newton. Within this field, potential difference between two points separated by a distance of 1 cm is

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• To charges ${q_1}$ and ${q_2}$ are placed $30\,\,cm$ apart, shown in the figure. A third charge ${q_3}$ is moved along the arc of a circle of radius $40\,cm$ from $C$ to D. The change in the potential energy of the system is $\frac{{{q_3}}}{{4\pi {\varepsilon _0}}}k$, where $k$ is

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