Small drops of the same size are charges to V volt each. If n such drops coalesce

Small drops of the same size are charges to V volt each. If n such drops coalesce to form a single large drop, its potential will be

Options

(a) Vn
(b) V/n
(c) Vn¹/³
(d) Vn²/³

Correct Answer:

Vn²/³

Explanation:

Potential at the surface of a solid charged sphere = (1 /4πε₀).(q / a)

(4/3) πr³ × n = (4/3) πr’³

Due to n changes, Vn = (1 /4πε₀).(nq / r’),

r’ = rn¹/³

Vn = (1 /4πε₀).(nq / n¹/³ r) = V n²/³

admin:

Related Questions

  1. If wavelength of a wave is λ=6000 Å, then wave number will be
  2. The approxiamate ratio of nuclear mass densities of ₇₉Au¹⁹⁷ and ₄₇ Ag¹⁰⁷ nuclei is
  3. An electron moving in a uniform magnetic field of induction of intensity B,
  4. A transformer having efficiency of 90% is working on 200 V and 3kW power supply
  5. The potential difference that must be applied to stop the fastest photoelectrons