Two spheres P and Q of equal radii have densities \rho_1\text{and}\rho_2 respectively.The spheres are connected by a massless string and placed in liquids L_1\text{and}L_2 of densities \sigma_1\text{and}\sigma_2 and viscosities \eta_1\text{and}\eta_2,respectively.They float in equilibrium with sphere P in L_1 and sphere Q in L_2 and the string being taut(see figure). If sphere P alone in L_2 has terminal velocity V^{\to}_p and Q alone in L_1 velocity V^{\to}_Q,then [JEE Adv 2015 P2]

|V^{\to}_p/V^{\to}_q|=\eta_1/\eta_2

|V^{\to}_p/V^{\to}_q|=\eta_2/\eta_1

JEE Advanced 2015 Paper 2

Section: Physics

Question : 9 of 60

Marks: +1, -0

Two spheres P and Q of equal radii have densities ρ1‌and‌ρ2 respectively.The spheres are connected by a massless string and placed in liquids L1‌and‌L2 of densities σ1‌and‌σ2 and viscosities η1‌and‌η2,respectively.They float in equilibrium with sphere P in L1 and sphere Q in L2 and the string being taut(see figure).

If sphere P alone in L2 has terminal velocity

→

p and Q alone in L1 velocity

→

Q,then

[JEE Adv 2015 P2]

|
→
V
p
→
V
q
|=
η1
η2
|
→
V
p
→
V
q
|=
η2
η1
→
V
p.
→
V
q>0
→
V
p.
→
V
q<0

Validate

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