25 replies to this topic

[giz]

i'm kind of stuck on a question on my electrical engineering assignment and could do with a push in the right direction!

i've been given handouts by the course tutor and i've taken notes in all the lessons but i can't seem to get my head around this question,
i'll write it out exactly as it's written:

calculate the time constant for the cicuit, the voltage drop across the resistor and capacitor at t = 0s, t = C.R.s, t = 5 x C.R.s. also calculate the charge on the capacitor at these points and the energy stored and dissipated in the two components.

i've worked out the time constant but the rest..... i don't have a clue!
i'm not looking for an easy way out or answers which is why i haven't put any values of the cicuit in, i just need the formulas to work it out my self.

all help will appreciated

giz

[Broomer]

This reminds me why i changed from being an apprentice electrical technician to a mechanical technician.

[giz]

i was soooooo excited that some one had replied, i thought hoorar someone can help.......


but no


atleast if i fail i know what i could do!

[Bungle]

thats not a electricians thing that electronics

different job

[giz]

again i thought hooray a reply but then i saw the word bungle so i didn't need to read it to find out it wasn't the one i was looking for!!

isn't someone who works with electronics an electrician? i'm an apprentice electrician and this is what i'm learning!
if not what am i doing??

[MiNi FiZ]

nah electricians are totally different from electronics,

electronics has a wider field

im doing electronics engineering and i still have no clue what your talking about...

can you scan the handout you've got?

[giz]

nah electricians are totally different from electronics,

electronics has a wider field

im doing electronics engineering and i still have no clue what your talking about...

can you scan the handout you've got?

yep here you go (task 7)

[attachment=44026:ebay.jpg]

Edited by nataliegizfish, 18 November 2007 - 10:48 PM.

[Bungle]

i'm an electrician and can wire a house but have no idea about electronics

[giz]

i'm an electrician and can wire a house but have no idea about electronics

would you like to have a guess then because i'm totaly clueless!

[Bungle]

i wouldnt know where to start

now about that extra socket .............................

[giz]

[Silicon Skum]

Ok, I do electronics - but I'm dyscalculic........so I'm NO good with maths. To b honest I tend to just use component values that are close enough to match the circuit I'm building.......and then use a bigger value if they let the magic smoke out...

I *think* the question requires Kirchhoff's Voltage Law to solve the question, or Kirchhoff's Current Law. I think.

Sorry can't help out much more - it's a bit beyond my abilities.


SS

[M44K TS]

I covered this sort of C**p during my City & Guilds when i did my security course, voltage drop and capacitors etc, absolute pain in the arse, i have the paperwork somewhere, i'll dig it out and see if we covered that scenario

I'm sure i have my notes somewhere

[Amy]

My other half is a fully qualified Electrician.... but also has a degree in Electronic engineering..... if you can wait until tonight, when he gets home I'll get him to have a look and see if he can help!

Edited by Amy, 19 November 2007 - 08:23 AM.

[Brawlyrox]

Never ask Bungle to wire anything, ask him what happens when he wired his own house