J
John S
- Jan 1, 1970
- 0
I have 10 resistors of 18 ohms/25 watts each. I will use them for a load
bank I am building.
In trying to achieve flexibility, I began asking myself what maximum
number of different resistances are possible with any combination of
them. It is obvious that two in parallel is 9 ohms, three in parallel is
6 ohms, etc, down to 1.8 ohms. It is also obvious that two in series is
36 ohms, three is 54 ohms, etc up to 180 ohms.
Then I began thinking of combinations of series/parallel like two in
series (or parallel) with one in parallel (or series), and so on.
I think you get my drift. My brain too old and out of practice now to
set up the problem and I was never good at that Binomial Theorem thing
to begin with. Can somebody enlighten me?
Many thanks,
John S
bank I am building.
In trying to achieve flexibility, I began asking myself what maximum
number of different resistances are possible with any combination of
them. It is obvious that two in parallel is 9 ohms, three in parallel is
6 ohms, etc, down to 1.8 ohms. It is also obvious that two in series is
36 ohms, three is 54 ohms, etc up to 180 ohms.
Then I began thinking of combinations of series/parallel like two in
series (or parallel) with one in parallel (or series), and so on.
I think you get my drift. My brain too old and out of practice now to
set up the problem and I was never good at that Binomial Theorem thing
to begin with. Can somebody enlighten me?
Many thanks,
John S