Physics: The hot and neutral wires supplying DC power to a light-rail commuter train carry 700 A and are separated by 70.0 cm. What is the magnitude (in N) of the force between 30.0 m of these wires?

The hot and neutral wires supplying DC power to

mckadams02

29.01.2022

4.197 N

Explanation:

current through the wires I = 700 A

distance between wires r = 70 cm = 0.7 m

length of each wire L = 30 m

force per unit length on the wires is given as

$\frac{F}{L}$ = $\frac{u*I^{2} }{2\pi r }$

where u = permeability of vacuum = 1.256 $10^{-6}$ m-kg- $s^{-2}$ $A^{-2}$

F = $\frac{u*I^{2}L }{2\pi r }$

F = $\frac{1.256*10^{-6} *700^{2}*30 }{2*3.142*0.7 }$ = 4.197 N

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markyyy53

20.08.2020

sorry can't read, cuz too small the words.

Explanation:

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