List of top Physics Questions on Electric Potential and Electric Potential Energy

Two point charges \(-q\) and \(+q\) are located at points \((-a, 0, 0)\) and \((a, 0, 0)\) respectively. Find the electrostatic potential at point \((x, 0, 0)\) where \(x \gg a\).
In the figure, OA and OB show the variation of electric potential \(V\) at a point due to two point charges \(Q_1\) and \(Q_2\) with \(\frac{1}{r}\) respectively. Here \(r\) represents the distance of the point from the two point charges.
(I) Identify the nature of the two charges \(Q_1\) and \(Q_2\).
(II) What is the value of \(\left(\frac{Q_1}{Q_2}\right)\)? Justify your answer.
Two point charges \(-q\) and \(+q\) are located at points \((-a, 0, 0)\) and \((a, 0, 0)\) respectively. Find the electrostatic potential at point \((x, 0, 0)\) where \(x \gg a\).
In the figure, OA and OB show the variation of electric potential \(V\) at a point due to two point charges \(Q_1\) and \(Q_2\) with \(\frac{1}{r}\) respectively. Here \(r\) represents the distance of the point from the two point charges.
(I) Identify the nature of the two charges \(Q_1\) and \(Q_2\).
(II) What is the value of \(\left(\frac{Q_1}{Q_2}\right)\)? Justify your answer.
A proton travels through a distance of $5\text{ m}$ in the direction of uniform electric field of intensity $4\text{ NC}^{-1}$. The work done on the proton by the electric field is
A unit positive point charge is slowly moved through an infinitely thin tube inside a uniformly charged dielectric sphere of radius \(R\) and volume charge density \(\rho\). The initial and final positions of the charge are \(B\) and \(A\), located at distances \(3R\) and \(2R\) respectively from the centre. If the magnitude of work done on the charge is \[ \frac{\rho R^2}{n\varepsilon_0} \] then find \(n\).
એક યુનિટ સકારાત્મક પોઇન્ટ ચાર્જને એક સમાન રીતે ચાર્જિત ડાયલેક્ટ્રિક ગોળા (ત્રિજ્યા \( R \), વોલ્યુમ ચાર્જ ઘનતા \( \rho \))ની અંદર અત્યંત પાતળી ટ્યુબમાંથી ધીમે ધીમે ખસેડવામાં આવે છે. ચાર્જની પ્રારંભિક અને અંતિમ સ્થિતિ B અને A છે, જે કેન્દ્રથી અનુક્રમે 3R અને 2R દૂર છે. જો ચાર્જ પર કરેલા કાર્યનું મેગ્નિટ્યુડ \( \frac{\rho R^2}{n \varepsilon_0} \) હોય તો \( n \) શોધો:
Consider a fixed uniformly charged insulating sphere with radius \(R\) and total charge \(+Q\). A point charge \(-q\) (\(q \ll Q\)) with mass \(m\) is released from rest at a distance of \(3R\) from the centre of the charged sphere. When the point charge reaches the surface of the sphere, its speed is:
Match List-I with List-II.
Choose the correct answer from the options given below:
Two masses connected in series with two massless strings are hanging from a support as shown in the figure. Find the tension in the upper string.