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Physics - Electrostatics Question with Solution | TestHub

PhysicsElectrostaticsdipoleEasy2 minPYQ_2020

PhysicsEasysingle choice

An electric dipole, of length $2 c m$ , is placed with its axis making an angle $30 °$ with a uniform electric field. If it experiences a torque of $10 \sqrt{3} N m$ , then potential energy of the dipole is

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Answer:

Solution:

$τ = P E s i n 30$

$10 \sqrt{3} = \frac{P E}{2}$

$P E = 20 \sqrt{3}$

Potential energy = $- P E c o s 30$

potential energy = $- 20 \sqrt{3} \times \frac{\sqrt{3}}{2}$

$= - 10 \times 3 = - 30 J$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:ElectrostaticsSubtopic:dipole

⏱ 2mℹ️ Source: PYQ_2020

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