Question

an electric dipole consist of two equal and unlike charges +-2muc seperated by a distance 10nm. calculate the potential energy of the dipole when it is placed in an electric field E=100NC^-1 parallel to field lines

Answer 1

Answer:

Formula:

Torque (τ) = pE sinϴ

Here,

E = ${10}^{ - 5}$

ϴ=90°

$P = q \times 2d \\ P = 10^{ - 6} \times 2 \times 2 \times {10}^{ - 2} \\ P = 2 \times {10} ^{ - 8}$

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Now, Substituting all the values in the formula.

τ = 2× ${10}^{ - 8}$ ${10}^{ - 5}$×1

[sin 90°=1]

τ = 2× ${10}^{ - 13}$ C m.