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LCSphysicist

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- Homework Statement
- a cable infinite and very thin that carries current and has charge density

null in the reference of fixed positive charges, in addition, consider a

charge particle q positioned at a distance l from the cable and traveling

in parallel direction to the cable with the same speed (relativistic) u

of the electrons in the cable.

- Relevant Equations
- .

There are some question involving the statement. One of them is about the charge density in S' frame. It asks to calc it.

I thought that i could calculate the electric field in the referencial frame S' and, then, use the formula

$$ E = \lambda / 2 \pi \epsilon l $$

In that way, i would obtain ##\lambda##. Is that a reasonable way to find the charge density? Is there another way?

I thought that i could calculate the electric field in the referencial frame S' and, then, use the formula

$$ E = \lambda / 2 \pi \epsilon l $$

In that way, i would obtain ##\lambda##. Is that a reasonable way to find the charge density? Is there another way?

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