![]() The Ohm's Law wheel represents all possible relationships between power (P), resistance (R), current (I) and voltage (V). When you combine the formulas you get the Ohm's Law Formula Wheel, shown below, which reflects how our calculator works. This basic equation can be transformed into different formulas depending on the known electrical measurements and is how our Ohm calculator works. To calculate electrical power, which is the rate at which electrical energy is transferred through a conductor per unit time, we need to know that P = V x I (from Joule's Law), where P is the power in Watts, V and I according to the above definitions. Ohm's Law is applicable for electrical circuits containing resistive elements only (capacitors and inductors are not allowed) and it works the same for constant (DC) or time-varying (AC) driving voltage or current. The three are equivalent transformations of the Ohm's law formula and are used in circuit analysis and planning of electrical grids. ![]() Where I is the current in amperes, V is the voltage in Volts, and R is the resistance in Ohms (Ω). The relationship is mathematically described by the equations: Ohm's law states that the current between any two points of an electrical conductor is directly proportional to the voltage across the two points. Using this tool you can easily calculate ohms to watts, ohms to volts, ohms to amps, volts to ohms, watts to ohms, amps to ohms, and so on. The result will be displayed in the metrics chosen with supported metrics being: amperes, milliamperes, milliwatts, watts, kilowatts, megawatts, gigawatts, millivolts, volts, kilovolts, megavolts, ohms, kiloohms, and megaohms. ![]() Just enter the two known quantities describing the electrical current and the other two will be calculated based on them. ![]() Calculate voltage and resistance given power and current.Calculate current and voltage given power and resistance.Calculate current and resistance given voltage and power.Calculate power and voltage given current and resistance.Calculate power and current given voltage and resistance.Calculate power and resistance given the voltage and current.Using the above multipurpose ohms law calculator, you can: More References and Links Resistors in Parallel. Rn: = 4,6,10.5 Ohmsĭecimal Places = 4 Equivalent Resistance: = Ohms You may enter any number of resistances separated by commas. Rn as positive real numbers separated with commas and then press "Calculate Equivalent Resistance". Use the Parallel Resistors Calculator Enter the resistances of the resistors R1, R2. When the above is solved for Req, we obtainįor 3 resistors R1, R2 and R3 in parallel, Req is given byĪdvertisement Req = R1 R2 R3 / (R1 R2 + R1 R3 + R2 R1)Īs it can be seen, the calculations becomes complicated as soon as we start increasing the number of parallel resistors in the circuit. + 1 / Rm For example, for 2 resistors R1 and R2 in parallel, Req is given by These resistors have an equivalent resistance Req that has the same effects on the other parts of the circuit and is given by the resistors in parallel formula:ġ / Req = 1 / R1 + 1 / R2 +. Consider the group of parallel resistors R1, R2. A parallel resistors calculator that calculates the equivalent resistance is presented.
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