Tuesday

March 31, 2015

March 31, 2015

Posted by **lisa** on Saturday, May 28, 2011 at 5:46pm.

Определить линейную плотность заряда бесконечно длинной нити, если работа сил поля по перемещению заряда Q = 1 нКл с расстояния r₁ = 5 cм до r₂ = 2 см в направлении перпендикулярном нити равна 50 мкДж.

- physics -
**Damon**, Saturday, May 28, 2011 at 6:02pmI am not sure how much your book gives you.

I will assume that you know that:

E = [ 1/(2pieo) ] lambda/r

where lambda = charge per unit length

and

r is distance perpendicular to the line

then

Voltage potential of point a at ra with respect to potential at point b at rb is:

Va -Vb = integral from a to b of E dr

= [lambda/(2pieo)]integral dr/r

= [lambda/(2pieo)] ln (rb/ra)

calculate that

now

work done = charge* voltage difference

**Answer this Question**

**Related Questions**

Physics - An infinitely long line of charge has linear charge density ë. Find ...

Physics - An infinitely long line charge of uniform linear charge density λ...

Discrete Math - Solve the recurrence relation a_n = -2a_n-1 + 15a_n-2, n ≥...

Physics - Consider the electric field created by a very long charged line of ...

physics - Consider the electric field created by a very long charged line of ...

Physics - Consider the electric field created by a very long charged line of ...

Physic Help - Charge is distributed through an infinitely long cylinder of ...

Physics - Two infinitely long slits, S1 and S2, each of width d=0.1 cm are used ...

linear algebra - use a computer software or graphing utility to solve the system...

Physics - An infinitely long line charge of uniform linear charge density &#...