Daya
\(P = \dfrac {\text{Usaha}}{\text{waktu}} = \dfrac{W}{t} \quad \text{Watt}\)
Efisiensi
\(\eta = \dfrac {\text{Daya output}}{\text{Daya input}} = \dfrac{P_{\text{output}}}{P_{\text{input}}} \times 100%\)
\(P = \dfrac {\text{Usaha}}{\text{waktu}} = \dfrac{W}{t} \quad \text{Watt}\)
\(\eta = \dfrac {\text{Daya output}}{\text{Daya input}} = \dfrac{P_{\text{output}}}{P_{\text{input}}} \times 100%\)