a) An oil drop of mass 3×10⁻¹¹g and of radius 2×10⁻⁴cm carries 10 excess electrons. What is its terminal velocity when i) falling in a region in…
Class 12 Physics · 2082 · Solved Question with Answer
a) An oil drop of mass 3×10⁻¹¹g and of radius 2×10⁻⁴cm carries 10 excess electrons. What is its terminal velocity when
i) falling in a region in which there is no electric field?
ii) falling in an electric field of 3×10⁵ Vm⁻¹ directed downward?
(Viscosity of air = 1.8×10⁻⁵ NSm⁻²)
b) In Thomson's method for determining specific charge of an electron, why is the electric field kept perpendicular to magnetic field? Justify.
c) What is the use of X-rays in Millikan's oil drop experiment?