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How electrical charge relates to voltage, current, and resistance. What voltage, current, and resistance are. What Ohm's Law is and how to use it to understand electricity.
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).
Complete the following questions using the equation: V = I x R or R = V ÷ I or I = V ÷ R 6. What is the potential difference across an electrical load that has a resistance of 4 Ω and a current of 3 A
”The amount of current flowing in a circuit made up of pure resistances is directly proportional to the electromotive forces impressed on the circuit and inversely proportional to the total resistance of the circuit.”
Use I = E / R to prove this. The Voltage in the circuit is 120 V, the resistance is 50 ohms, the current is 2.4 amps. If the voltage is decreased to 12 volts, the amperage (current) will decrease to .24 amps. The voltage is 1/10 original value and the Amperage is now 1/10 the original value.
Ohm's Law Formula Original statement IR voltage = Current Resistance Other derived formulas Power (P) 12R VI Ohm's law formulas Current & Resistance Current & Power Voltage & Current Voltage & Resistance Voltage & power & Resistance _ lectrical EEE Voltage (V) V = IR To Calculate Current (l) Resistance (R) rmg.com www.elec -calandelectronicsengi
resistance. The following formula was derived from that law: Current = Voltage/Resistance or I = E/R Current (I) in amps: Voltage (E) in volts: Resistance (R) in ohms FIGURE 7: OHM’S LAW Ohm’s Law is the basic formula used in all AC and DC electrical circuits. So if you know two of the three characteristics, your can calculate the third one.
