Voltage And Resistance Formula

V i r and the power law equation formula.

Voltage and resistance formula. V 150 v. Voltage is represented in equations and schematics by the letter v. Introducing the constant of proportionality the resistance one arrives at the usual mathematical equation that describes this relationship. First version of the voltage formula.

Since the current is set by the values of the voltage and resistance the ohm s law formula can show that. R v i resistance voltage current. Voltage v current i x resistance r v volts i amps x r ω for example. The above calculator will help you to.

P power i or j latin. V voltage electric potential difference δ v or e electromotive force emf voltage. The nominal impedance z 4 8 and 16 ohms loudspeakers is often assumed as resistance r. What is the resistance value.

Find the voltage applied across 15 kω resistors when 10 ma current flows through it. P i v. The resistance value is 36 0 ω. The mathematical formulas of ohm s law.

But we have designed this one especially for dc circuits as well as work for single phase ac circuits without power factor. If there is a voltage v across a resistor r a current i flows through it. V i r. The voltage v in volts v is equal to the square root of the power p in watts w times the resistance r in ohms ω.

When we know the voltage and the current we can calculate the resistance. Rearrange v ir to solve for resistance. V 10 ma x 15 kω. The power p in watts w is equal to the voltage v in volts v times the current i in amps a.

The total resistance across the circuit must be r t 12 volts 8 amps 1 5 ohms. How to calculate power. 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. So for this analogy remember.

Voltage volts current amps x resistance ω. If a current i should flow through a resistor r the voltage v can be calculated. When describing voltage current and resistance a common analogy is a water tank. In this analogy charge is represented by the water amount voltage is represented by the water pressure and current is represented by the water flow.

The resistance value can be found by rearranging one of the forms of the electric power formula. The form that is applicable relates power voltage and resistance. Ohm s law can be rewritten in three ways for calculating current resistance and voltage. The resistance r in ohms ω is equal to the voltage v in volts v divided by the current i in amps a.

The thermal energy is being generated at a rate of 16 0 w. The power p in watts w is equal to the squared voltage v in volts v divided by the resistance r in ohms ω. Where i is the current through the conductor in units of amperes v is the voltage measured across the conductor in. Ohm s law equation formula.

For example a series circuit is powered by a 12 volt battery and the current is measured at 8 amps. Influare international ampere or intensity and r resistance.