Ohm's Law Cheat Sheet for Electrical Engineers, Cheat Sheet of Electrical Engineering

Download Ohm's Law Cheat Sheet for Electrical Engineers and more Cheat Sheet Electrical Engineering in PDF only on Docsity! OHM’S LAW The rate of the flow of the current is equal to electromotive force divided by resistance. I = Intensity of Current = Amperes E = Electromotive Force = Volts R = Resistance = Ohms P = Power = Watts The three basic Ohm’s law formulas are: E E I = ––– R = ––– E = I x R R I Below is a chart containing the formulas related to Ohm’s law. To use the chart, from the center circle, select the value you need to find, I (Amps), R (Ohms), E (Volts) or P (Watts). Then select the formula containing the values you know from the corresponding chart quadrant. Example: An electric appliance is rated at 1200 Watts, and is connected to 120 Volts. How much current will it draw? Watts P 1200 Amperes = ––––– I = –– I = –––– = 10 A Volts E 120 What is the Resistance of the same appliance? Volts E 120 Ohms = ––––––– R = –– R = –––– = 12 Ω Amperes I 10 - 1 - E I P R VOLTS OH MS WA TT S AMPS R x I P I P x R E I E2 PP I2 E R P E E2 R P R E x I R x I2