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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsPotential & potential energyEasy2 minPYQ_2020

PhysicsEasysingle choice

Three charges $- q, Q$ and $- q$ are placed at equal distances on a straight line. If the potential energy of the system of three charges is zero, then what is the ratio of $Q : q$

Options:

Answer:

Solution:

$U = \frac{- k Q q}{r} \times 2 + \frac{k q^{2}}{2 r} = 0$

$2 \times \frac{k Q q}{r} = \frac{k q^{2}}{2 r}$

$2 \times \frac{Q}{1} = \frac{q}{2}$

$\frac{Q}{q} = \frac{1}{4}$

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

⏱ 2mℹ️ Source: PYQ_2020

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