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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsPotential & potential energyEasy2 minPYQ_2020

PhysicsEasysingle choice

Three charges are placed at the vertex of an equilateral triangle as shown in figure. The value of $Q$ , for which the electrostatic potential energy of the system is zero, is

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Answer:

Solution:

Electrostatic potential energy of the system of charges is

$U = \frac{1}{4 π \in_{0}} [\frac{Qq}{a} + \frac{Qq}{a} + \frac{q^{2}}{a}]$

$U = \frac{1}{4 π \in_{0}} [2 Qq + q^{2}]$

Given, $U = 0$

$2 Qq + q^{2} = 0$

$Q = - \frac{q}{2}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:Potential & potential energy

⏱ 2mℹ️ Source: PYQ_2020

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