Resistance Power And Voltage

If voltage and current are given then you can easily calculate the value of the power.

Resistance power and voltage. Since power measured in watts is a. The voltage v in volts v is equal to the current i in amps a times the resistance r in ohms ω. P power i or j latin. When describing voltage current and resistance a common analogy is a water tank.

The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow. V 10 ma x 15 kω. For this reason the quantities of voltage and resistance are often stated as being between or across two points in a circuit. The above calculator will help you to calculate the power using a simple power formula.

V 150 v. Voltage volts current amps x resistance ω. In this calculator table you may enter two of the four factors in ohm s law. For very low values of resistance for example milli ohms mω it is sometimes much easier to use the reciprocal of resistance 1 r rather than resistance r itself.

V i r and the power law equation formula. The nominal impedance z 4 8 and 16 ohms loudspeakers is often assumed as resistance r. V v i a r ω. Power voltage current resistance p v i r calculator.

The power used or dissipated by a resistor can be found using the formula v ir. Ohm s law discovered in 1827 by georg simon ohm states that the current in a conductor is proportional to the voltage and inversely proportional to the resistance. Influare international ampere or intensity and r resistance. Voltage is represented in equations and schematics by the letter v.

So for this analogy remember. They are power p or w measured in watts voltage v or e measured in volts current or amperage i measured in amps amperes and resistance r measured in ohms. The power p in watts w is equal to the voltage v in volts v times the current i in amps a. Ohm s law equation formula.

Power in a resistance is always positive regardless of voltage polarity and current direction. How to calculate power. This formula can be used to substitute for the voltage or for the current in the power formula and the power output of a battery that has internal resistance can be found using the formula v ε ir and the formula for 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.

V voltage electric potential difference δ v or e electromotive force emf voltage. Most electrical calculations involving resistance voltage current or power are solved using ohm s law. Power p voltage v current i. 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.