A dipole with two electric charges of 2 μ C magnitude each, with separation distance 0.5 μ m , is placed between the plates of a capacitor such that its axis is parallel to an electric field establish

Question

A dipole with two electric charges of 2 μ C magnitude each, with separation distance 0.5 μ m , is placed between the plates of a capacitor such that its axis is parallel to an electric field established between the plates when a potential difference of 5 V is applied. Separation between the plates is 0.5 mm. If the dipole is rotated by 3 0 ∘ from the axis, it tends to realign in the direction due to a torque. The value of torque is :

TestHub · Accepted Answer

​ E = d v ​ = 5 × 1 0 − 4 5 ​ = 1 0 4 V / m τ = PE sin θ ​ Where P = qa = 2 × 1 0 − 6 × 5 × 1 0 − 7 = 1 × 1 0 − 12 C − m τ = 1 × 1 0 − 12 × 1 0 4 × 2 1 ​ = 5 × 1 0 − 9 N − m

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