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What is the relationship among electric power, voltage and current in series circuit? What is the relationship among electric power, voltage and current in parallel circuit
In a series circuit, the total electric power is equal to the sum of the power of each component, the total voltage is equal to the sum of the voltage of each component, and the total current is equal to the current of each component, that is, the current is equal everywhere. In a series circuit, the total electric power is equal to the sum of the power of each component, the total current is equal to the sum of the current of each component, and the total voltage is equal to the current of each component
Is 1 / M (X-Y) an integral or a fraction
Fraction
The voltage of a student's home is 10% lower than that of 220 v. at this time, the actual power of the working "220 V 100 W" incandescent lamp is 0
Filament resistance constant = 220 * 220 / 100 = 484
The actual voltage is 198v
Power = 198 * 198 / 484 = 81w
First, resolve the fraction A & sup2; - 9 / A & sup2; + 6A + 9 △ A-3 / A & sup2; + 3a-a-a & sup2; / A-1
=(a+3)(a-3)/(a+3)²×a(a+3)/(a-3)-(a-a²)/(a-1)
=a+a(a-1)/(a-1)
=2a
2.5 4 6 10 square bv line in the voltage of 220 V and 380 V can bear the power of electrical appliances? (within 100 meters) thank you
Copper wire model single current carrying capacity (a) raceway current carrying capacity (a) lamp current carrying capacity (a) voltage drop MV / m correction factor
BV(30.C)
1.0mm2/c10690.7
1.5mm2/c1581030.860.7
2.5mm2/c20121818.90.7
4mm2/c25202311.760.7
6mm2/c4025307.860.7
10mm2/c5030414.670.7
16mm2/c7040532.950.7
25mm2/c9060701.870.7
35mm2/c11070871.350.7
50mm2/c175901091.010.7
70mm2/c2201201300.710.7
95mm2/c2801501700.520.7
120mm2/c3001802100.430.7
150mm2/c3802202340.360.7
185mm2/c4502502610.30.7
One room is 5.2 meters long, 3 meters wide and 6 meters wide. The lower parts of its four walls are painted with 1.10 meters high light green paint (1 square meter at the door is not painted)
If a square meter of light green paint costs 10 yuan, how much will it cost?
10×【（5.2+3）×2×1.1-1】
=10×【18.04-1】
=10×17.04
=170.4 yuan
When the power of my electric appliance is 850W, and the power per hour is one block, how can I calculate the power consumption of this electric appliance in one hour?
850W is 0.85kwh. 1kwh means 1000W of electricity per hour. 1000W is one degree of electricity, which means 0.85kwh
(1) 2B & # 178; + (a + b) (a-b) - (a-b) & # 178; where a = - 3, B = 1 / 2
2b²+(a+b)(a-b)-(a-b)²=2b²+a²-b²-(a²-2ab+b²)=2ab=2×(-3)×(1/2)=-3
Why is the resistivity of copper film much higher than that of copper
The copper film is obtained by the fusion of copper particles by heat treatment, but in the sintering process, with the evaporation of organic solvent, there are tiny cavities in the copper film, so the resistivity of the copper film is higher than that of the copper film
How to calculate? N = 0.011 d = 200 S1 = 10.3n ^ 2 / D ^ 5.33 = 10.3 * 0.011 ^ 2 / 0.2 ^ 5.33=
It's the power
What's behind him is the power
For example, n ^ 2 is the square of n
0.2 ^ 5.33 is the 5.33 power of 0.2
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