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What is the equation used to calculate the resistance current or voltage?
S = Apparent Power P = Real Power [Negative for supplied power, positive for absorbed power] Q = Reactive Power [Positive for lagging or inductive loads, negative for leading or capactive loads] Fp = Power Factor [Specified as lagging or leading for inductive or capacitive loads respectively] V = Voltage I = Current * = (Conjugate) < = 'At an angle of' For DC cases: |P| = P = V x I = V^2 / R = I^2 x R For AC cases: S = V x I* = |S| < arccos(Fp) |S| = |V| x |I| |P| = |S| x Fp |Q| = sqrt(|S|^2 - |P|^2)
What are the relationships between current power and resistance?
Power is inversely proportional to resistance. Ohm's law: Current is voltage divided by resistance Power law: Power is voltage times current, therefore power is voltage squared divided by resistance.
Why ups rating is in kva?
The kva rating includes the power factor of the connected load.KW * Power Factor = kva.AnswerThe above answer is incorrect, as it's actually kV.A x power factor = kW.The answer is straightforward, the output of the UPS is the product of its rated output voltage and its rated output current, and the product of voltage and current is 'apparent power', expressed in volt amperes.
Why Voltage x Current do not equal rated power?
In an AC system power is equal to Voltage x Current x Power factor. Power factor is not constant and depends on the type of the load. Ideal value of the Power factor is 1, where as practically remains less then 1.
240 volts ac 100 ma is equal to how many watts?
Hi, the formula used to calculate this is P = U x I.where:P = Watt (W)U = voltage (V)I = current (A)You need 2 units to calculate the third one.Volt x current equals Watt240 V x 0.1 A (equals 100mA) = 24 WattAnswerThe equation for (true) power in an AC circuit is: P = (U I) x power factorSo, you need to know the power factor of the load in order to calculate the power. With the information you supply, you can only calculate the apparent power, expressed in volt amperes, which is the product of the supply voltage and the load current -using the figures that you supply, this will be 24 V.A.
What is a volt-ampere the product of?
A volt - ampere is the unit for the product of voltage and current. This is power. Power = voltage x current. The unit of power is more usually called the watt. Volts x amps = watts.
How many kilowats are in 1 amp?
Watts (or kilowatts) and amperes are used to measure different things. Watts is a unit of power; ampere is a unit of current. The relationship (for direct current) is: watt = ampere x volt For AC, the relationship is a bit more complicated: watt = ampere x volt x power factor However, the power factor is often close to one.
What is the amperage for a 480 volt 108 K w unit?
Use the formula: power = voltage x current x power factor If you don't know the power factor, assume it is 1 - this is close enough for many devices. In units: power (in watts) = voltage (in volts) x current (in amperes)
Which is greater 1kw equals equals KVA?
In the case of DC, and in AC when current and voltage are in phase, a volt-ampere is the same as a watt (and therefore, a kilo-volt-ampere is the same as a kW). In the case of AC, when current and voltage are NOT in phase, power = voltage x current x power factor; the power factor is the cosine of the angle between current and voltage, and it is always less than or equal to one. In such a case, a kVA would be less than a kW.
How much power is used by a 6 Volt battery that draws 0.5 A of current?
The power used by the battery can be calculated using the formula P = V x I, where P is power, V is voltage (6V), and I is current (0.5A). Substituting the values, the power used by the battery is P = 6V x 0.5A = 3 Watts.
How many amps does a 277 volt primary and 120 volt secondary transformer draw with 6 amps on the secondary?
Assuming the transformer is ideal, the current on the primary side can be calculated using the formula for power: P(primary) = P(secondary). Since power is the product of voltage and current, the current on the primary side would be 1.38 amps (277V x Iprimary = 120V x 6A).
Watts equal to volt ampere?
In a direct current (DC) system, watts are equal to volt-amps. However, in an alternating current (AC) system, the relationship between watts and volt-amperes (VA) depends on the power factor of the system. The power factor is the cosine of the phase angle difference between the voltage and current waveforms.
How many volts in 2watts?
it would depend upon the current. Power (watts) = I (current in amps) x E (voltage). 2 watts = 15 amps x .133 volts 2 watts = 20 amps x .10 volt
How much current flows in a 12-watt radio connected to a 120-volt circuit?
Since power = current x voltage, you would divide the power (watts) by the voltage. The answer would be 1/10 amps or .10 amps.
A heater draws 8.70 amps on a 110 volt line What is its wattage rating?
Power = Voltage x Current P=V.I Power (in Watts) = 110V x 8.70A = 957W (Appx. 1kW) - Neeraj Sharma
How much current flows in a 12 watt radio connected to 120 volt circuit?
A 120V household electrical outlet supplies 12 watts of powerwhen the current is 0.1 Ampere (and the power factor is 100%).
A 6-volt battery produces a current of 0.5 amps what is the power in the circuit?
The power in the circuit can be calculated using the formula P = V x I, where P is power, V is voltage, and I is current. In this case, the voltage is 6 volts and the current is 0.5 amps, so the power in the circuit would be 3 watts (6 volts x 0.5 amps = 3 watts).
