a little help and advice

[Patto]

hi all, i have my 204 exam soon just want a second opinion on my answers to the questions and any advice given would be great.Q1 why does the choke voltage and lamp voltage not add up to the supply voltage.A1 the voltages across the choke and tube do not add up to the supply volatge due to the choke being an inductor producing a back EMF causing the voltage to lead the current by 90 degrees, they are out of phase..Q2 explain the effect a capacitor has on the supply current of an inductive load.A2 A capacitor will cause the current to lead the voltage so by adding this into an inductive load it will bring the current closer to being in phase with the voltage, this is know as power factor correction.i will add phasor diagrams to the above on the day...as for Q1 im sure i can use a right angled triangle to show this but looking through my notes i cant find were we did it.

 

[Patto]

I copied this from my original post in the trainee room were it was neat and dor some reason its laid it out as one full text... my apologies.

 

[Patto]

Hey guys n girls am I on the right track?

 

[telectrix]

looks OK to me, but bear in mind i've forgotten a lot of theory, being a bit rusty.LOL.

 

[Patto]

Lol.. Im still doing it and its hard to keep it in lol been going 2 years now and nearly finished my level 2.. thanks for replying.

Craig

 

[Landril]

You may find this type of theory people have long forgotten, unless they are Sheldon Coopers of the world that have eidetic memories.
The working man normaly remembers the important theories and calculations due to his brain cells being killed by drinking too much alchol

 

[Patto]

Lol fair play matie..

 

[bartkusal]

All your answers correct, well done