An electric dipole is placed at an angle of 30 ° with an electric field of intensity 2 × 10 5 N C - 1 . It…

An electric dipole is placed at an angle of 30° with an electric field of intensity 2×105 N C-1. It experiences a torque equal to 4 N m. Calculate the magnitude of charge on the dipole, if the dipole length is 2 cm.
  1.  2 mC 
  2.  8 mC 
  3. 6 mC
  4. 4 mC

Solution

Torque experienced by the electric dipole is given by,

τ→=p→×E→⇒4=pEsinθ⇒4=ql×2×105×sin30°⇒q=4105×2×10-2=2×10-3 C=2 mC

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Asked in: NEET 2023 (All India)

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