Physics

Which of the following parallel-plate capacitors hold the largest charge?
A) A capacitor with area A and separation 2d connected to voltage 4V
B) A capacitor with area 2A and separation d connected to voltage 2V
C) A capacitor with area 2A and separation 2d connected to voltage V
D) A capacitor with area A and separation d connected to voltage V

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  1. C=q/U
    C=εε₀A/d
    q=CU= εε₀AU/d
    A) q1= εε₀A4V/2d= 2 εε₀AV/d
    B) q2 = εε₀2A2V/d= 4 εε₀AV/d max
    C) q3 = εε₀2A V/2d= εε₀AV/d
    D) q4 = εε₀A V/d= εε₀AV/d

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