impedance

[searley]

a capacitor of capacitive reactance 50ohms, an inductor of 80ohms inductive reactance and a resistor of 40ohms are connected in series to a 200 50Hz supply. the impedanceof the circuit will be ?

where do a start.

 

[Nicky Tesla]

50 up and 80 straight down (if pure) leaves 30ohm inductive reactance.

Now use trigonometry (i can't remember the formula)

30 straight down and 40 pure resistance horizontal. then find the length of the hypotenuse and the angle

 

[The Godfather]

http://www.allaboutcircuits.com/vol_2/chpt_5/2.html

Don

 

[Jono Pashley]

Z=√R

 

[searley]

god father got this of a city & guilds sheet a can never understand what they want that`s why i put so many questions on here. thanks 170ohms look`s good.

 

[Andy™]

thanks 170ohms look`s good.

looks good, but isnt right

see Jono's post

Maybe not - its almost there but not quite

 

[searley]

jono`s post can`t be write the 4 answers they have giveing me is

40ohms

50ohms

80ohms

170ohms

they i mean city & guilds.

 

[Andy™]

start over, didnt fully read jono's post, but it looked more right than godfathers

jono is almost there..

Z=√R

 

[searley]

thanks andy.

does this get any easier ? i wanna go and find a bridge.

 

[Andy™]

does this get any easier ?

not until your qualified where you will probably never need to know it again

 

[searley]

i am just pleased you don`t charge by the hour a would be well skint.

thanks again pal.

 

[Andy™]

start over, didnt fully read jono's post, but it looked more right than godfathersjono is almost there..

Z=√R

 

[Andy™]

i am just pleased you don`t charge by the hour a would be well skint.

and i would be almost rich enough to quit

Maybe i should go work for the local college instead of proper work.....

...or maybe not

 

[green-hornet]

We did it with slide rules when I was learning, we could not use calculators!

Never had to work out complex formula since to be honest

 

[Andy™]

We did it with slide rules when I was learning, we could not use calculators!Never had to work out complex formula since to be honest

id be lost without my calculator!

 

[Apache]

id be lost without my calculator!

I'd be lost without my TomTom

(nothing useful to add............)

 

[Andy™]

I'd be lost without my TomTom (nothing useful to add............)

my tomtom doesnt work properly... PDA keeps freezing... ill eventually get round to getting it repaired....

 

[Apache]

my tomtom doesnt work properly... PDA keeps freezing... ill eventually get round to getting it repaired....

I abuse Jane and she's never let me down

 

[Andy™]

I abuse Jane and she's never let me down

if only she didnt have such a limited vocabulary...

 

[Apache]

if only she didnt have such a limited vocabulary...

Applaud Smiley:^O

Does your's say 'keep right' every now and again on a motorway, just as a generally reassuring break to the radio?