1. The problem statement, all variables and given/known data Trying to calculate capacitance on an LC circuit 2. Relevant equations L = 1.0H (solenoid inductance) i = 3.0 Ma (current in circuit) Q = 30μC (charge on capacitor) E = 4.5μJ (energy in oscillations) 3. The attempt at a solution All i'm after is an equation for capacitance that i can use with the given information I know that V=IR and I=Q/T and C=Q/V but none of these tie in what i'm trying to achieve. Any help would be great.