Recent content by dc2209

1. The question is "what speed will the generator need to be driven to give an output of 240V D.C?" the generator is constructed using one pole pair having a sq surface of 6cm x 6cm and produces a flux of 18mWb. It has 4 commutator segments. 2. Possibly F = (P * N) / 120? I am not sure 3. F =...

Hi I have been trying to find the types of equipment required to protect 3 phase generators+transformers for a while now but I just cannot seem to find anything. If you could help me out and give me examples of the equipment it would be greatly appreciated Thanks

Sorry I see now. As a final answer I got 223.499 now, I am really hoping that is correct

I'm unsure on calculus, I understand as much that you multiply by the limits of x and then subtract it but with the x I do not know

2x^3/3 + 7x^2/2 + 24x = [ 250/3 + 175 /2 +24] - [ 16/3 + 28/2 + 24 ] = 194.83 - 43.33 = 151.497?

So I got 151.497 units of area this time using the correct indefinite

Ah I see what you mean.

He has misplaced a 3 for a 2, but I didn't use that in my calculation so 190.5 should be correct?

Ok I got (250/2 + 175/2 +24 ) - (16/2 + 28/2 + 24) = 236.5 - 46 = 190.5 units of area? Does that sound correct? Thanks, Ps, would y = -x^2 + 1 use the same method?

1. Hi, I have been asked to calculate the area beneath a curve. The curve is y = 2x^2 + 7x + 24 and the values of x to find the area within are 5 and 2. 3. My attempt stands as follows: A = 5,2∫ (2x^2+7x+24)dx [ 2x^3/2 + 7x^2/2 + 24x...

1. Hi, the question is "A simple D.C motor has been constructed using one pole pair having a square surface of 6cm × 6cm and produced a flux of 18mWb. The commutator has 4 segments, which allows for two simple loops to be connected. Two brushes are used with the positive applied to the brush...

Ah yeah the third numbers are powers. Ok thanks

This is my answer, would you say that seems right to you? Cable length = 50 km Cable resistance = 0.227 ohms/km (single ostrich) Ostrich resistance = 50 x 0.227 = 11.35ohms 2 cable parallel resistance = 11.35 || 11.35 = 5.68ohms Max current per ostrich = 492A I =...

the 400kV circuit is then stepped down onto a 132kV circuit (Ratio 3:1) and is used to feed a 50km, 2 wire (Ostrich) cable circuit, calculate voltage loss in the cable run. and this a table that went with the question http://gyazo.com/a47c72d45a149cffa9d781ace8a2008d and the first question...