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Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectrostatic Potential and Capacitance2 Marks
Question
Two uniformly large parallel thin plates having charge densities +σ and –σ are kept in the X-Z plane at a distance 'd' apart. Sketch an equipotential surface due to electric field between the plates. If a particle of mass m and charge '-q' remains stationary between the plates, what is the magnitude and direction of this field?
✓

Answer

Depiction of equipotential surtace

(Parallel to the X - Z plane)

qE = mg

$\Rightarrow\text{E} = \frac{\text{mg}}{\text{q}}: $ direction vertically downwards.

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