maths one

[skystorm]

Hi all back on night shift

A conductor has across-sectional area of 20mm2, a lenght of 48m and is made of material with resistivity of 0.02 u ohms m .Its resistance is

 

[revjames]

why not have a crack at it yourself. You just need to engage brain before posting...

 

[Andy™]

about double it would be if it was 10mm

 

[revjames]

depends wether the cable is round CSA or flat as the electricity struggles to get through flat cables and you dont mention if the cable is going round corners and how many and what raidus bends? These are all obstacles for the electrons....

 

[Andy™]

Sky storm would you like a proper question posted in the student section to tax you brain ?

you mean something like 2+2= ?

i think he would still ask for help rather than trying it himself...

 

[Doc Hudson]

Hi all back on night shiftA conductor has across-sectional area of 20mm2, a lenght of 48m and is made of material with resistivity of 0.02 u ohms m .Its resistance is

Try here http://www.talk.electricianforum.co.uk/student-learning-zone-c-g-2330-levels-2-3-c-g-2381-c-g-2391-other-co/16912-another-resistance-one.html For a hint what you wrote last time.

Hi alla conductor has across-sectional area of 20mm2 a length of 48m and is made of material with a resistivity of 0.02uohmsm, its resistance is

i get 48

can anyone remember me how to work it out thanks

 

[skystorm]

no thats abit to hard how about this one A transformer is rated at 10kva . the greatest current it can supply at 0.8 pf is ( is that what you wont )

 

[Andy™]

no thats abit to hard how about this one A transformer is rated at 10kva . the greatest current it can supply at 0.8 pf is ( is that what you wont )

the answer, or at least an attempt would be useful.

 

[Doc Hudson]

Cluttering the forum with duplicate posts & threads only makes it messy and cumbersome for our members. The forum has a search facility or you can view your previous threads & posts in your personal profile. Please use these facilities in future to save repeat posts. Also please have a go at answering your own question first rather than just expecting others to work out your homework. It is a little more polite to type I think that A+B=C, is this correct please? Rather than just typing what is A+B? {you did this on your one posts, but do have a habit of not trying first.}

Doc H.

 

[philbas]

[quote name='Andy

 

[septiclecky]

No I said a proper question ; -)

You mean "If it takes 10 men 10 days to dig a hole 10' x 10' x 10', How long does it take to dig half a hole"

 

[philbas]

1 + 1 = 10Simples - to be or not to be :slap

There ar 10 types of people in the world, those that understand binary and those that don't

 

[kerching]

[quote name='Andy

 

[philbas]

I had a client once who insisted on all keyboard wires be changed from curly to straight ; The curly ones were making the PCs work too slowly!!!

This is a well known myth, the REAL problem is the relative position of the keyboard with the computer, If the keyboard is higher than the computer then gravity assists the signals, on the other hand if the keyboard is lower than the computer the signals have to fight gravity and will be much slower.

However, the converse applies to the monitor, so the ideal setup is the monitor on the floor, the computer on the desk and the keyboard on a shelf above the desk, this will ensure maximum speed.

 

[kme]

http://www.talk.electricianforum.co.uk/student-learning-zone-c-g-2330-levels-2-3-c-g-2381-c-g-2391-other-co/17134-test-question-students-level-hard.html#post230124

If you get it right you may qualify for a beer from KME's fridge

PM me the answer

PM me to see if you qualify.

 

[Sidewinder]

Well you've had enough from mine!... ; )

BTW you were home early today!

OOOPS!

Yesterday, time for bed me thinks teaching to be done today!

Having spend a few hours fixing Mrs SW car, I had lost all track of time.

 

[johninlondon1]

looks like i mucked up, read this post after just completing your new question, should i leave it there or delete it

 

[Theorysparky]

I think John you need to stand in the corner until boatboy deals with you !!!!!!

 

[Andy™]

Soooooooooooooooooooo, the larger the CSA of the cable the higher the resistance?

nothing in this thread makes sense....