Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsdipoleMedium2 minPYQ_2019

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An electric dipole is formed by two equal and opposite charges $q$ with separation $d$ . The charges have same mass m. It is kept in a uniform electric field $E .$ If it is slightly rotated from its equilibrium orientation, then its angular frequency $ω$ is:

Options:

Answer:

Solution:

solution

$τ = p E \sin θ$
For small angle,
$τ = p E θ$
$α = \frac{τ}{I} = \frac{p E}{I} θ$
$(∵ α = ω^{2} θ)$ Angular frequency $= \sqrt{\frac{p E}{I}}$
$= \sqrt{\frac{(q d) E}{(m \frac{d^{2}}{4} + m \frac{d^{2}}{4})}}$
$= \sqrt{\frac{2 q E}{m d}}$

Stream:JEESubject:PhysicsTopic:ElectrostaticsSubtopic:dipole

⏱ 2mℹ️ Source: PYQ_2019

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