Capacitors and Energy StoredSign up
understand that capacitance is defined as C = Q/V and be able to use this equation · be able to use the equation W = 1/2 QV for the energy stored by a capacitor, be able to derive the equation from the area under a graph of potential difference against charge stored and be able to derive and use the equations W = 1/2 C V^2 and W = 1/2 Q^2 / C · be able to draw and interpret charge and discharge curves for resistor capacitor circuits and understand the significance of the time constant RC · CORE PRACTICAL 11: Use an oscilloscope or data logger to display and analyse the potential difference (p.d.) across a capacitor as it charges and discharges through a resistor · be able to use the equation Q = Q0 e^(-t/RC) and derive and use related equations for exponential discharge in a resistor-capacitor circuit, I = I0 e^(-t/RC), and V = V0 e^(-t/RC) and the corresponding log equations ln Q = ln Q0 - t/RC, ln I = ln I0 - t/RC and ln V = ln V0 - t/RC
