physicshelpline - Question of the day , Electrostaticsphysicshelpline - Question of the day , Electrostaticshttps://www.physicshelpline.com/Question/electrostaticsSat, 20 Jun 2026 19:31:10 +0530http://zoho.com/sites/<![CDATA[Electrostatic energy ]]>https://www.physicshelpline.com/Question/post/electrostatic-energy

Q- A point charge q is placed at each corner of a cube of edge l. Find electrostatic energy of the system of charges.


Solution:

]]>Fri, 03 Apr 2026 19:13:25 +0530<![CDATA[Force due to a charge distribution]]>https://www.physicshelpline.com/Question/post/force-due-to-a-charge-distribution

Q- Positive charge Q is distributed uniformly along the x-axis from x = 0 to x = a. A positive point charge q is located on the x-axis at x = a + r. 

(a) Calculate the x-component of the electric field produced by the charge distribution Q at points on the positive x-axis where x > a. 

(b) Calculate the force that the charge distribution Q exerts on q.

Solution:

]]>Sat, 28 Feb 2026 10:30:46 +0530<![CDATA[Equivalent Capacitance]]>https://www.physicshelpline.com/Question/post/equivalent-capacitance

Q- Find the equivalent capacitance between points a and b in the combination of capacitors shown in Figure. C1 = 2.0 µF and C2 = 3.0 µF.


Solution:

]]>Mon, 02 Feb 2026 16:12:30 +0530<![CDATA[Electrostatics: Capacitance]]>https://www.physicshelpline.com/Question/post/electrostatics-capacitance

A spherical capacitor has two different layers of dielectrics between its plates. Their permittivity are ϵ1 for a < r < r0 and ϵ2 for r0 < r < b. Find the capacitance of this system by finding the total energy of the fields between the plates.

Solution:

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