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# What are some electrical formulas?

Some electrical formulas include Ohm's Law, which states that voltage equals current times resistance, and the formulas associated with Kirchhoff's Laws, one of which states that the sum of all voltages must add up to 0. Kirchhoff's formulas only apply to circuits, while Ohm's Law and formulas are generally applicable.

Continue ReadingOhm's Law is expressed mathematically in a number of different ways, with formulas that lend themselves better to finding voltage, resistance or current, as the case may be. All of these formulas are, however, mathematically equivalent. One important formula based on Ohm's Law is the power formula, which states that power is equivalent to voltage times current.

Kirchhoff's Laws are fundamental to circuit theory and design. One states the sum of all currents leaving a node in an electrical network always equals 0. The second of Kirchhoff's Laws states that the sum of all voltages across a closed circuit also equals 0. The formulas for these laws are often used by electrical engineers to analyze electrical nodes and build accurate models of circuits.

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## For what purposes can you use an Ohm's Law calculator?

A: An Ohm's Law calculator is used to substitute values into an equation that compares voltage to resistance to determine electrical current. On a DC circuit,... Full Answer >Filed Under: -
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## What is Krichhoff's loop rule?

A: Kirchhoff's loop rule states that the sum of the potential drops around a closed loop in a circuit is equal to the voltage supplied to the loop. This rule ... Full Answer >Filed Under: -
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## What is the current divider rule?

A: The current divider rule states that the portion of the total current in the circuit that flows through a branch in the circuit is proportional to the rati... Full Answer >Filed Under: -
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## How many amps does 1500 watts use?

A: Using Ohm's Law, 1500 watts of energy uses 12.5 amps. Ohm's Law defines the relationship between amps, watts and resistance. In the United States, electric... Full Answer >Filed Under: