KCET2023PhysicsElectrostatics
In the situation shown in the diagram, magnitude, if q
Options
- A1 4 ₀ p q r^3 i ,- 1 4 ₀ p q r^2 k
- B1 4 ₀ p q r^2 k , 1 4 ₀ p q r^3 i
- C- 1 4 ₀ p q r^2 k ,- 1 4 ₀ p q r^3 i
- D1 4 ₀ p q r^3 i ,+ 1 4 ₀ p q r^2 k
Correct answer
D. 1 4 ₀ p q r^3 i ,+ 1 4 ₀ p q r^2 k
Step-by-step solution
Net force due to dipole on equatorial line, F_ e q =E q = K p r^3 i q= 1 4 ₀ p q r^3 i Net torque; =F r_ = 1 4 p q r^3 i r( j )= 1 4 ₀ p q r^2 k Hence, option (d) is correct.