Which one of the following statement is correct with regard to the viscous coupling?

Which one of the following statement is correct with regard to the viscous coupling? Correct Answer In the viscous coupling, the viscosity of the silicone oil limits the speed differential between the outer and inner plates

Related Questions

In a two-electron atomic system having orbital and spin angular momenta $${l_1}{l_2}$$  and $${s_1}{s_2}$$  respectively, the coupling strengths are defined as $${\Gamma _{{l_1}{l_2}}},\,{\Gamma _{{s_1}{s_2}}},\,{\Gamma _{{l_1}{s_1}}},\,{\Gamma _{{l_2}{s_2}}},\,{\Gamma _{{l_1}{l_2}}}$$      and $${\Gamma _{{l_2}{s_1}}}.$$  For the jj coupling. scheme to be applicable, the coupling strengths must satisfy the condition
Which of the following statements are true? Statement 1: LS coupling is suitable for lighter atoms. Statement 2: JJ coupling is suitable for heavier atoms.
Spherical balls of radius R are falling in a viscous fluid of viscosity Ƞ with a velocity v. The retarding viscous force acting on the spherical ball is ___________