Parallel resistances - 25 characters

[gazdkw82]

Little mop up. Where am I going wrong? Done loads of parallel resistances before with no problems

 

[JAWS]

I make it 1.165 round it off 1.17.

 

[Richard Burns]

1/3 is 0.3333333...
add the 0.03333... that is missed off and then the total is 0.8583333...
1/0.8583 = 1.165 as Massive1 has said above.

 

[telectrix]

i made it 1.1723329426Meg.

 

[gazdkw82]

Ah yes. My calc come up with 0.3 with the dot above the 3 which means reoccurring...

Thanks

 

[Ian1981]

If you’ve got a scientific calculator then just use the 1/x button but don’t forget to press 1/x button at the end of your adding of all the resistances values.
10 1/x + 10 1/x + 8 1/x + 5 1/x + 3 1/x = ..... 1/x = 1.165 or rounded 1.17M ohms

 

[Richard Burns]

If you do it with common factors then you go from 1/10+1/10+1/8+1/5+1/3 to
12/120+12/120+15/120+24/120+40/120
=103/120
so 120/103 =1.165049MΩ

 

[Ian1981]

If you do it with common factors then you go from 1/10+1/10+1/8+1/5+1/3 to
12/120+12/120+15/120+24/120+40/120
=103/120
so 120/103 =1.165049MΩ

i like to cheat with a calculator

 

[gazdkw82]

I just used the devision button and typed it in as it appears and it came up with the correct answer

 

[telectrix]

how do you think we managed back in the day when calculators were just a dream in clive sinclair's head?

 

[gazdkw82]

That one

 

[telectrix]

thast's not a calculatgor, it's partof the starship enterprise.

 

[Ian1981]

That one


View attachment 41638

I just use the calculator on my phone

 

[Ian1981]

how do you think we managed back in the day when calculators were just a dream in clive sinclair's head?

Yes an abacus can’t help you here

 

[Tes369]

That's not just any calculator that's a Casio FX-991ES Plus not as good as FX-85gt+