# Yahoo Web Search

1. Sort by

...2 ) xl = 300 ohms L = 300 / 2 pi 800 L = 0.0596 H for pf = 1 ----> xc = xl f = 1 / 2 pi sqrt (LC) 1000 = 1 / 2 pi sqrt(0.0596C...

2 Answers · Science & Mathematics · 29/12/2014

2. ### the capacitance of a capacitor?

...pi = 6.12 x 10^-6 F or 6.12 uF p = xi^2 = 250 x 1.2^2 = 360 w pf = p / v i = 360 / 600 x 1.2 = 0.5

1 Answers · Science & Mathematics · 27/12/2014

3. ### Value of series resistance?

pf = cos φ = 0.3 sin φ = √1-0.3^2 = 0.954 = X/Z Z = X/sin φ = 40/0.954 = 41.93 ohm 0.3 = R/Z R = Z*0.3 = 41.93*0.3 = 12.58 ohm....10 ohm is wrong !!!

2 Answers · Science & Mathematics · 26/12/2014

4. ### Am i doing this right?

yes...that is correct ...

1 Answers · Science & Mathematics · 08/12/2014

5. ### about AC power supply loss sensor?

...the transformer primary side. http://www.zen22142.zen.co.uk/Circuits/Alarm/pf_alm.htm If you want to detect a brown out condition (low volts like ...

2 Answers · Science & Mathematics · 03/12/2014

6. ### In a balanced delta connection hooked to a 3-phase generator, how do you find the power per phase given only the impedance and line voltage?

You can determine the PF because you know the load impedance and angle. Each phase consumes the same power and the total power is the sum of them.

2 Answers · Science & Mathematics · 24/10/2014

7. ### What happens when we bypass a capacitor?

amount of capacity increases on LC ( series ) ....Z = sq [ R^2 + ( 2 pi f L - 1 / 2 pf f C )^2 ].......Z decreases....so voltage across R increases .

3 Answers · Science & Mathematics · 20/10/2014

8. ### A 2200/250V transformer takes 0.5A at a pf of 0.3 on open circuit. Find the magnetising and working components of no-load primary current.?

The magnetising component is 0.5 x 0.954 = 0.477 amps {note that : 0.954 = sin[arc-cos(0.3)]} The working component is 0.5 x 0.3 = 0.15 amps You don't seem very good at awarding Best Answer. I like to see some...

2 Answers · Science & Mathematics · 07/10/2014

9. ### how many standard resistor and capacitor values are there?

...read in the same way as that for resistors except the base unit is pF (picoFarad, 1 pF = 10-12 F = 10-6 μF). So a...

7 Answers · Science & Mathematics · 16/09/2014