Manipal MET2018PhysicsElectrostatics
Small rain drops of the same size are charged to potential V volt each. If n such drops coalesce to form a single drop, then the potential of the bigger drop is
Options
- An^ 1 / 3 V
- Bn^ 2 / 3 V
- Cn V
- Dn^ 3 / 2 V
Correct answer
B. n^ 2 / 3 V
Step-by-step solution
aligned & (b) 4 3 r^3 n= 4 3 R^3 & R=n^ 1 / 3 r & V_ big = 1 4 ₀ Q R = 1 4 ₀ n q n^ 1 / 3 r =n^ 2 / 3 ~V aligned