An electric dipole is placed at an angle of 30 ° with an electric field intensity 2 × 10 5 N C - 1 . It experiences a torque equal to 4 N m . The charge on the dipole, if the dipole length is 2 cm , is

Question

An electric dipole is placed at an angle of 30 ° with an electric field intensity 2 × 10 5 N C - 1 . It experiences a torque equal to 4 N m . The charge on the dipole, if the dipole length is 2 cm , is, 8 mC, 2 mC, 5 mC, 7 μ C

MARKS App · Accepted Answer

τ = P E sin ⁡ θ ⇒ τ = q l E sin ⁡ θ ⇒ q = τ l E sin ⁡ θ = 4 2 × 10 - 2 × 0.5 × 2 × 10 5 = 2 m C

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