Electricians should know their maths full stop! Do you?

[D Skelton]

Ok, so following on from darkwood's original thread on basic maths I thought I'd start a thread for people to add a few things that are a little more complex than basic multiplication and division. Nothing too hard but should still be easy peasy for any spark!

I'll start with this:




Make G the subject

ps. you can use MS Word or Math Input Panel in the accessories menu to write formulae.

 

[D Skelton]

Wow, 7 hours and 50 views and still no takers!?

C'mon people, surely it can't only be me that finds maths enjoyable?





Or maybe it is :49:

 

[Silly Sausage]

Just seen it!
Got to go now.
Answer will follow later.

Archy
(O level Elementary Maths
O level Advanced Maths
A level Maths
Numerous Higher Level Maths courses)

 

[Geordie Spark]

Just seen it!
Got to go now.
Answer will follow later.

Archy
(O level Elementary Maths
O level Advanced Maths
A level Maths
Numerous Higher Level Maths courses)

You forgot "Habitual Bull Sitter".

 

[Elmer BeFuddled]

Gotta say, I love me math. But you've got me here!!

 

[i=p/u]

Don't know why any sprk will need to know this, but I enjoy maths and haven't a clue, it's one of them things they brush on but you never need it ,


easier ones skelli

 

[Silly Sausage]

G[SUP]2 [/SUP]= (e.f[SUP]0.5[/SUP])/(h((a.d[SUP]2[/SUP])/b.c)[SUP]2[/SUP])

G = ((e.f[SUP]0.5[/SUP])/(h((a.d[SUP]2[/SUP])/b.c)[SUP]2[/SUP]))[SUP]0.5[/SUP]

 

[Silly Sausage]

You forgot "Habitual Bull Sitter".

...:24:

 

[Silly Sausage]

OK Dave (D Skelton, it's got to be! )

Easy one...

RYB rotating anti clockwise, if R is the reference, what are Y & B in complex form?
Assume per unit form.

 

[telectrix]

can't do the symbols but my answer is 32 . G = 32ft/sec^

 

[D Skelton]

Don't know why any sprk will need to know this, but I enjoy maths and haven't a clue, it's one of them things they brush on but you never need it ,


easier ones skelli

Recognise any of these equations?



That's one reason why knowing this stuff might be useful

 

[Geordie Spark]

Recognise any of these equations?

View attachment 17217

That's one reason why knowing this stuff might be useful

Now yer just showin' off !!!

 

[D Skelton]

OK Dave (D Skelton, it's got to be! )

Easy one...

RYB rotating anti clockwise, if R is the reference, what are Y & B in complex form?
Assume per unit form.

Dave it is not

Erm, ya got me stumped! All I can see is 120 and 240? Either I'm missing something fundamental or I'm massively overthinking it!

Maybe if you were to expand on the context of the question I might see what you're getting at.

G= (e.f[SUP]0.5[/SUP])/(h((a.d[SUP]2[/SUP])/b.c)[SUP]2[/SUP])

G[SUP]0.5[/SUP] = ((e.f[SUP]0.5[/SUP])/(h((a.d[SUP]2[/SUP])/b.c)[SUP]2[/SUP]))[SUP]0.5[/SUP]

Very nearly!

One correct answer would be:

 

[Silly Sausage]

Dave it is not

Erm, ya got me stumped! All I can see is 120 and 240? Either I'm missing something fundamental or I'm massively overthinking it!

Maybe if you were to expand on the context of the question I might see what you're getting at.





Very nearly!

One correct answer would be:
View attachment 17218

Derek,

Balls! I'm going to have to look at my workings on that, too flash for my own good there!.

RYB, think vectors, think j (sqrt(-1)) and all will be revealed.

 

[D Skelton]

Derek,

Balls! I'm going to have to look at my workings on that, too flash for my own good there!.

RYB, think vectors, think j (sqrt(-1)) and all will be revealed.

Ahh yes!

Derek it is not

fR = cos(ωt) + (e[SUP]jα[/SUP] x cos(ωt - (2π/3))) + ((e[SUP]jα[/SUP])[SUP]2[/SUP] x cos(ωt + (2π/3)))


Am I on the right track?

 

[Silly Sausage]

Dennis,

There is a much more simpler way, love your use of the awesome number that is e!

Hint... Y is -0.5 + j0.866

 

[D Skelton]

Dennis,

There is a much more simpler way, love your use of the awesome number that is e!

Hint... Y is -0.5 + j0.866

Dennis it is not,

Yes I guessed, but I assumed you wanted the beans! lol, you did afterall ask for it in complex form

Oh and BTW, with regards to your earlier transposition of the formula I posed, it was only your G and your G[SUP]2[/SUP] values that were the wrong way round, I'd put that down to a brain fart rather than a lack of understanding

p.s, the 'D' has satanical connotations and you've only got six hundred and sixty six guesses

 

[Silly Sausage]

Damian

My head is full of gas.

 

[RmBo_0]

Transposition of formulae, I actually enjoyed it. A lot of my colleague buddies didn't though.

 

[Geordie Spark]

Damian

My head is full of gas.

Mine's full of s..t - but you already knew that.