resistance.....

If the potential difference decreases by a factor of n after every ladder then the ratio of R1/R2 is

4 Answers

62
Lokesh Verma ·

The question is a classic one .. with recurrence.. Has been solved with a very little modification...

[url=http://targetiit.com/iit-jee-forum/posts/infinite-4412.html]Infinte resistance ladder[/url]

1
cute_cat ·

is d ans (n+1)^22n

62
Lokesh Verma ·

see V = iR1+iR+iR1

where iR=V/n
so V=niR (which if we substitute back in the first equation, we get...)

so (n-1)R=2R1

now find R1 which should not be very difficult :)

1
cute_cat ·

okay thanks a lot...

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