Q.

C1 and C2 are two hollow concentric cubes enclosing charges 2Q and 3Q respectively as shown in the figure. The ratio of electric flux passing through C1 and C2 is    [2024]

1 2 : 5  
2 5 : 2  
3 2 : 3  
4 3 : 2  

Ans.

(1)

Flux through C1ϕ1=qinε0=2Qε0

Flux through C2ϕ2=qinε0=2Q+3Qε0=5Qε0

C1C2=ϕ1ϕ2=2Q/ε05Q/ε0=25