Home 1 Student: toa222Buky.edu My Account Log Out l Help HW15 Begin Date: 7/25/2

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Home 1 Student: toa222Buky.edu My Account Log Out l Help HW15 Begin Date: 7/25/2018 12:00:00 PM Due Date: 7/30/2018 11:59:00 PM End Date: 7/30/2018 11:59:00 PM (8%) Problem 4: Two very long, parallel wires are separated by d = 0.055 m. The first wire carries a current of 11 = 0.85 A. The second wire carries a current of 12 0.15 A. Randomized Variables I, d- 0.055 m 11-0.85 A 12=0.15 A a20% Part (a) Express the magnitude of the force between the wires per unit length,f, in terms of I,,12, and d Grade Summary Ho Altempts remaining per atempt detailed view In(2) Hint I give Hints: deduction per hint. Hints remaining Feedback: doduction per feedhack ? 20% Part (b) Calculate the numerical value offin N/m. ? 20% Part (c) Is the force repulsive or attractive? 20% Part (d) Express the minimal work per unit length needed to separate the two wires from d to 2d 20% Part (e) Calculate the numerical value of win J/m. All content &2018 Expert TA, LLC

Explanation / Answer

A)

f= (uo/4*pi) *2*I1*I2/d

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B).

f= 10^-7* 0.85*0.15*2/0.055= 4.636*10^-7 N/m

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C).

Current is in same direction so force is attractive.

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D). Workdone= - fd=

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E). W= - 4.636*10^-7* 0.055= - 2.55*10^-8 J/m

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Comment in case any doubt.. good luck

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