Manipal MET2017PhysicsElectrostatics
An electric dipole is placed at an angle of 30^ with an electric field of intensity 2 10^5 NC ⁻¹ . It experiences a torque equal to 4 Nm . Calculate the charge on the dipole if the dipole length is 2 cm .
Options
- A8 mC
- B4 mC
- C8 C
- D2 mC
Correct answer
D. 2 mC
Step-by-step solution
Torque on dipole is aligned & =p E & =q 2 l E q & = 2 E l aligned Given, =4 Nm , E=2 10^5 NC ⁻¹ , gathered l=2 10⁻² ~m , =30^ q= 4 2 2 10^5 2 10⁻² 30^ gathered or q=2 mC