Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsElectric Field & ForceMedium2 minPYQ_2015
PhysicsMediummultiple choice

The figures below depict two situations in which two infinitely long static line charges of constant positive line charge density λ are kept parallel to each other. In their resulting electric field, point charges q and -q are kept in equilibrium between them. The point charges are confined to move in the x direction only. If they are given a small displacement about their equilibrium positions, then the correct statements(s) is (are)

Options:(select one or more)

Answer:
C
Solution:

In first case if q is shifted towards one of the wires, its repulsive force will increase which will bring the charge back. In second case, in same type of displacement attractive force due to wire increases which will make it move further towards wire.

Stream:JEE_ADVSubject:PhysicsTopic:ElectrostaticsSubtopic:Electric Field & Force
2mℹ️ Source: PYQ_2015

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