Question

Two square parallel–plate capacitors of capacitances C₁ and C₂ have the dimensions shown in the diagrams above. The ratio of C₁ to C₂ is

(A) 1 to 4 

(B) 1 to 2 

(C) 1 to 1 

(D) 2 to 1 

(E) 4 to 1

Answer 1

The correct option is: (B) 1 to 2 

Explanation:

C₁/C₂ = (ε₀A₁/d₁)/(ε₀A₂/d₂) = A₁d₂/A₂d₁ = s²(2d)/[(2s)²d] = ½