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In a certain balanced three-phase system each line current is 5 a and each line voltage is 220 v what is the approximate real power if the power factor is 0.7?
154
What significance has a power factor in an unbalanced system?
A three-phase 'unbalanced' system refers to the load, as the supply voltages are unaffected by load. So the phase-angle and, therefore, the power factor of each phase will be different -i.e. there will be three different power factors.
What is lpf and upf wattmeters?
LPF (Low Power Factor) and UPF (Unity Power Factor) wattmeters are instruments used to measure electrical power in AC circuits. LPF wattmeters are designed for circuits with low power factor, where the phase difference between voltage and current is significant, while UPF wattmeters are used for circuits operating at or near unity power factor, where the voltage and current are in phase. The choice between the two depends on the power factor of the system being measured, as each type provides accurate readings under its respective conditions.
What is the harmonic factor in a power system?
Two factors reduce the power used by a piece of equipment compared to the volt-amps drawn from the supply: power factor and harmonic factor. Both factors increase the power transmission losses incurred in supplying a given amount of power.The power factor is less than 1 when voltage and current are out of phase with each other.When they are in phase the power equals the volt-amps except for a nonlinear load with a current that is not proportional to voltage. This generates harmonics in the current and the effect is that the power is less than the volt-amps, by an amount equal to the harmonic factor.
How can you have 3 devices that run on 2400 watts each on a 10 amp circuit?
Watts = Volts x Current x Power Factor. Power Factor is one for resistive loads and less than one for reactive loads. If you assume 80% load factor on your 10 amp circuit that is 8 amps. So each of three devices would have to operate on 2.66 amps. To do this the applied voltage for each device would have to be 900 volts.
Write each power as a product of the same factor 7squared?
112
Does evaluate each expression and write each power as a product of the same factor mean the same thing?
yes
How do you write a power as a product of each factor?
103 = 10 x 10 x 10
How to write each power as a product of the same factor?
5^3 = 5 x 5 x 5
What does it mean when a math problem says Write each power as a product of the same factor?
10 to the third power equals 10 times 10 times 10
On your math homework the directions are Write each power as a product of the same factor What does this mean and please add an example?
3 to the third power = 3 x 3 x 3
What does write each power as a product of the same factor mean in math?
The power refers to the base and exponent, so to write it as the product (multiplication answer) of the same factor you would expand the exponent for example: 7^2 = 7*7 or 4^6 = 4*4*4*4*4*4.
How can you find the product of mixed numbers?
step 1 write each mixed number as an improper fraction step 2 look for common factor and simplify step 3 multiply write the product as a mixed number
What are the steps for greatest common factor?
Step 1 : Prime Factorise each number and write in index notation. Step 2 : Multiply the lowest power of each common factor of the given numbers
When two numbers or more multiplied each number is called a product?
Each number is called a factor. The answer is the product.
What does it mean that the product is greater than each factor?
In the equation 4 x 9 = 36, the product (36) is greater (larger) than each factor (4 and 9).
What is the power of the product of the same factor then find the value?
The power of a product states that when you raise a product of factors to a power, you can distribute the exponent to each factor. Mathematically, this is expressed as ((ab)^n = a^n \times b^n). If you have the same factor, such as (a), the expression ((a^m)^n) simplifies to (a^{m \cdot n}). For example, if (a = 2), (m = 3), and (n = 2), then ((2^3)^2 = 2^{3 \cdot 2} = 2^6 = 64).
