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The typical residential home in the US has a peak load power factor in the range of 0.90 to 0.95 lagging. The only way adding capacitors is going to save you on your electric bill is if your electric utility bills you in...

5 Answers · Science & Mathematics · 06/04/2008

Cos of the phase angle in the impedance coil circuit = .74 Phase angle of impedance coil circuit = arc cos .74 = 42.27 degrees Inductive vars = (sin 42.27 degrees) x 269 VA = 180.93 var Watts of impedance coil = p.f. x VA = .74 x 269 = 199 Watts...

2 Answers · Science & Mathematics · 01/02/2010

Varactor characteristics aren't linear http://spraguegoodman.com/pdfs/950.pdf The only way to plot a curve would be to either do an actual Vr versus capacitance or simulate it on one of the many electronic simulation programs. Assuming you meant 200μ...

2 Answers · Science & Mathematics · 23/02/2012

Initial charge is Q = CV = 19.2 nC Mica has a dielectric constant of about 7 (varies a lot, depending on type and source) so the capacitance changes to 2.4 nF x 7 = 16.8 nF new charge is 16.8 nF x 8 = 134...

2 Answers · Science & Mathematics · 05/12/2008

assuming it was an air dielectric and its capacitance went up by 2.6 times Q=CV = 80e-12*2.6*24 = 5e--9 coulombs energy storage = 1/2 C*V^2 = 1/2*5e-9*24 = 60e-9 Joules

3 Answers · Science & Mathematics · 15/09/2013

The first answer is correct. If you really need other answers, you can combine 9 caps in parallel and then put 6 sets of them in series. Or 18 caps and 12 sets. There are an infinite number of...

2 Answers · Science & Mathematics · 20/11/2013

Blender is a simple series universal motor that can be run on either AC or DC power source. It has a pair of carbon made brushes. It also has different turns of field windings connect to the selector where select the different...

2 Answers · Science & Mathematics · 12/03/2011

Given parameters of capacitor are: Capacitance C = 2000pF = 2000 x 10-12pF (1pF = 10-12F) Separation of plates = thickness of dielectric = 0.27mm = 27 x 10-5m Plates are square with dimension 20mm...

2 Answers · Science & Mathematics · 03/01/2013

Q = C*V C = Q/V = (1.2*10^-6/10) = 1.2*10^-7 Capacitors in parallel add, so if we need n capacitors C = 1.2*10^-7 = n*0.25*10^-12 n = 1.2*10^-7/(0.25*10^-12) = 4.8*10^5 = 480,000 <<<

1 Answers · Science & Mathematics · 11/02/2014

**pf**has little to do with efficiency, which is ratio of output power to input power. If**pf**is 0.5, and VA is 200, then power is 100watts. If...3 Answers · Science & Mathematics · 20/11/2012

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