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Electrical power is measured in watts. The formulas for power dissipated by a resistor are:
* P = V × I * P = V² / R
* P = I² × R P is power, V is voltage, I is current, R is resistance.
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∙ 15y ago
Wiki User
∙ 12y agopower=work/time (P=E/t) [1W=1J/1s]
power=force*distance/time (P=F*l/t) [1W=1N*1m/1s]
power=current*voltage (P=I*V) [1W=1A*1V]
Power unit is Watt (W)
Energy units
1 watt second = 1 joule
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What is the power dissipated by a resistor that has 5 amps flowing through it with 120 volts applied?
The power in a resistor (in watts) is simply the product of the current (in amperes) times the voltage (in volts).The power in a resistor (in watts) is simply the product of the current (in amperes) times the voltage (in volts).The power in a resistor (in watts) is simply the product of the current (in amperes) times the voltage (in volts).The power in a resistor (in watts) is simply the product of the current (in amperes) times the voltage (in volts).
How many watt DC to AC converter do you need to run a 6 amp power tool?
The formula for watts (or power) is Amps times voltage. Therefore with a 6 amp draw times 120 volts would be about 720 watts. A 1000 watt power inverter would do the job.
When the voltage is in volts and the current is in amperes electric power is expressed in watts?
The formula that you are expressing is Watts = Amps x Volts. There are two other ways to express watts. W = E (squared)/R and W = Amps (squared)/R. R is the resistance of a device in ohms.
What is the relationship between kw and current?
The formula you are looking for is Watts = Amps x Volts. killo = 1000 1 kw = 1000 watts.
How many watts are in one donkey power?
7
How are watts determined?
The watt is a measurement of power. In electrical circuit, to determined watts there is a formula volts x amps = watts
Formula for watts and amps?
power in watts = voltage in volts x current in amps. or power in watts = current in amps x (resistance in ohms) squared i think what you meant was power in watts =(current in amps)squared x resistance in ohms
What is ac power rating?
Power is calculated by the following formula, Watts = Amps x Volts.
How many KVA is 8000 watts?
8,000 watts = 8 kVA / (the power factor) If the power factor is 1, then 8 kVa = 8,000 watts.
What is the Formula to measure current if power is given?
Power = Voltage x Current Watts = volts x Amps
How many amps is 1500 watts at 120 volts?
A watt is a unit of power, and power is given by P = IV where P is power, I is current and V is voltage. Therefore, P = (15A)*(120V) = 1800V*A = 1800W
How much watts is 20milliamps?
Watts and Amps are two separate things. Watts is a measure of Power and Amp (Ampere) is a measure of electrical current. Look at the following formulae. Formula 1: W=V x I where W is Watts, V is Volts and I is Amps. Formula 2: I=V/R where I is Amps, V is Volts and R is Resistance (in Ohms) Formula 2 can be written as V=IxR and if you put this into Formula 1 you get a third formula which is: Formula 3: W=IxIxR So Power W is proportional to Current I squared. Note that milliAmps are Amps/1000 Ray Ashmore, Helston
What is ac power and ac voltage?
AC power is electricially, a value that is expressed in watts and voltage is the electromotive force that combined with amps, makes up the formula to find watts. Watts is the product of Amps x Volts. W = amps x volts.
How many watts is required to run a 3 amp well pump that draws on 220 volts?
The power (in watts) can be calculated using the formula: Power (W) = Voltage (V) * Current (A). In this case, the power required to run the 3 amp well pump on 220 volts is 660 watts (220 V * 3 A = 660 W).
What is the formula for real power?
volts times amps equal watts, or 550 lbs per sec equals 1 horse power.
What is the current in a circuit that has a resistance of 30 ohms and a power of 2 watts?
Use the formula: P=IR (power = current x resistance).
How many watts is 8 amps?
It's 120 x 8 for things with a power factor of 1, like electric heaters, irons or incandescent bulbs. If the item connected has a power factor less than 1, like electric motors, televisions, computers or CFL bulbs, you have to multiply by the power factor. <<>> The formula you are looking for is Watts = Amps x Volts.
