Current And Resistance Formula

An easier way to explain resistance is to consider an example of a person in a crowded market struggling to go from one shop to another.

Current and resistance formula. Power voltage current resistance p v i r calculator. V i r and the power law equation formula. Voltage can be thought of as the pressure pushing charges along a conductor while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along. If we increase the voltage the current will increase.

But we have designed this one especially for dc circuits as well as work for single phase ac circuits without power factor. This brings us back to georg ohm. Resistance refers to the amount that an object impedes or resists in an electric current. V voltage electric potential difference δ v or e electromotive force emf voltage.

If there is a voltage v across a resistor r a current i flows through it. The mathematical formulas of ohm s law. The nominal impedance z 4 8 and 16 ohms loudspeakers is often assumed as resistance r. Resistance if the electric power and the total resistance are known then the current can be determined by using the following formula.

In electronics and electromagnetism the electrical resistance of an object is a measure of its opposition to the flow of electric current the reciprocal quantity is electrical conductance and is the ease with which an electric current passes electrical resistance shares some conceptual parallels with the notion of mechanical friction the si unit of electrical resistance is the ohm ω. Ohm defines the unit of resistance of 1 ohm as the resistance between two points in a conductor where the application of 1 volt will push 1 ampere or 6 241 10 18 electrons. Ohm s law can be rewritten in three ways for calculating current resistance and voltage. How to find current becomes easy with our simple ohms law calculator concerning formula for current.

V i r. Electric current refers to the flow of electrons. This formula is derived from ohm s law. P i v.

If we increase the resistance the current will reduce. Using the flow analogy electrical resistance is similar to friction. This calculator is based on simple ohm s law as we have already shared ohm s law p i v r calculator in which you can also calculate three phase current. The team of a calculator online provided a simple and efficient tool known as ohms law calculator through which you can readily find out the value of voltage v current i power p and resistance r concerning simple ohm s law formula.

The circuit with the higher resistance will allow less charge to flow meaning the circuit with higher resistance has less current flowing through it. Ampere a watt w ohm ω where p is the electric power. Influare international ampere or intensity and r resistance. If a current i should flow through a resistor r the voltage v can be calculated.

This article discusses resistance along with the resistance formula and its derivation. Ohm s law equation formula. I p r corresponding units. P power i or j latin.