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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsElectric Field & ForceEasy2 minPYQ_2020

PhysicsEasysingle choice

Two identical charges of value $Q$ each are placed at $(- a, 0)$ and $(a, 0)$ . The coordinates of the points where the net electric field is zero and maximum are respectively -

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Answer:

Solution:

Net electric field will be zero at origin.

At any co-ordinate $(0, y)$ $E_{N e t} = 2 E \frac{c o s 2 θ}{2}$

$= \frac{k Q y}{{(a^{2} + y^{2})}^{\frac{3}{2}}}$

For maximum electric field $\frac{d E}{d y} = 0$

Solving $y = \pm \frac{a}{\sqrt{2}}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:Electric Field & Force

⏱ 2mℹ️ Source: PYQ_2020

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