Houjun Liu

Ohm's Law

\begin{equation} V = IR \end{equation}

where, \(V\) is the voltage across the resister, \(I\) the current, and \(R\) the resistance.

power (physics)

the rate at which electrical energy dissipates into heat is called power:

\begin{equation} P = IV \end{equation}

where, \(P\) is power, and \(I\) the current, and \(V\) the voltage.

Alternate formulation of power:

\begin{equation} P = I V = \frac{V^{2}}{R} = I^{2} R = \dv{E}{t} \end{equation}