Two parallel-plate capacitors have the same plate area, but the plate gap in capacitor 1 is twice as big as capacitor 2. if capacitance of the first capacitor is c, then capacitance of the second one is:

Capacitance of the second capacitor = 2C

Explanation:

Where A is the area, d is the gap between plates and ε₀ is the dielectric constant.

Let C₁ be the capacitance of first capacitor with area A₁ and gap between plates d₁.

We have    

Similarly for capacitor 2

Capacitance of the second capacitor = 2C

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