AC Circuit Analysis - Capacitor

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Gorz

Homework Statement

Calculate the magnitude and sign of i₁₂ which will flow through a capacitor of 10microfarads when:

v₁₂ = +50V, and decreasing at a rate of 10⁴V/s

Vab=Q/C

No idea where to even begin with this question I am affraid. :(

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Gorz

Solved, please close.