- #1

- 1,395

- 0

i dont know what it means?

what it actually does ?

how to explain its function

in words

??

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- Thread starter transgalactic
- Start date

- #1

- 1,395

- 0

i dont know what it means?

what it actually does ?

how to explain its function

in words

??

- #2

diazona

Homework Helper

- 2,175

- 8

[tex]k\sum_i \Delta q_i \sum_j \Delta q_j \frac{(\vec{r}_j - \vec{r}_i)}{(\vec{r}_j - \vec{r}_i)^3}[/tex]

2) Do you understand why the sum is equivalent to the integral, when the number of charges is very very large?

[tex]k\int_0^L \lambda \mathrm{d}l_1 \int_{2L}^{3L} \lambda \mathrm{d}l_2 \frac{1}{(l_2 - l_1)^3}[/tex]

- #3

- 1,395

- 0

of sum from i and sum from j

??

i dont know why the this sum equals this integral

??

i know that integral is a sum too

bu thy look different

there is no i and j in the integral

no L in the sum

?

- #4

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- 0

?????????

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