Define Capacitance and the Farad

G482 Module 2 - Capacitors

Module 2: Capacitors Define capacitance and the farad Select (and use) an appropriate equation for calculating the charge stored on a capacitor Create an analogy to describe the movement of charge within a capacitor E/DAB/A

The charge stored per unit potential difference, as given by C = Q/V. Unit of capacitance (F). 1 F is 1 C of charge stored per volt. Capacitance and the Farad

W Potential difference against charge graph V Q

Module 2: e -capacitors Describe an exponential decay Use the RC circuit time constant, τ, where appropriate. Analyse the discharge of a capacitor after a time, t. E/DAB/A

n t / sh / mmh n / h (n-1) ln ( h / mm) * *If you’re under 18 beer is horrible, if you’re over 18 beer is awesome

h0h0 t0t0 t h h = h 0 e -λt

X0X0 t0t0 t X X = X 0 e -t/CR I = I 0 e -t/CR Q = Q 0 e -t/CR V = V 0 e -t/CR For radioactive decay A = A 0 e -λt

Module 2: e -capacitors Describe an exponential decay Use the RC circuit time constant, τ, where appropriate. Analyse the discharge of a capacitor after a time, t. E/DAB/A