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History Bookmarks People Window Help WA Homeworx webassign.net/web/student/Assignment-Responsessubmit?dep 16052678 Save Progres Practice Another Version My Noses o Ask You Teach O 0221 points l Previous Answers CJ9 20 P083 In the drawing below, R1 has a resistance of 6.5 n and R2 has a resistance of 3.0-n. Determine the current (magnitude and direction) in the 6.5 and 3-n resistons in the drawing. x A from let to right: IRI 2 IR2 -644 x A from left to right 12 O points 21 Poeo. My Notes Ask Your Teach The drawing shows four insulated wires overlapping one another, forming a square with 0,050-m sides. All four wires are much longer than the sides of the square. The net magnetic field at the center of the square is 19.5 uT, directed into the page. Calculate the current

Explanation / Answer

Use Kirchoff's voltage law on both the upper and lower loops.

for the upper loop:

4 - IR1R1 - IR2R2 = 0

=> 4 - 6.5IR1 - 3IR2 = 0

And for the lower loop:

12 - ( - IR2R2) = 0

=> 12 + 3IR2 = 0

=> IR2 = - 4 A

or IR2 = 4 A and it flows to the right.

substitute IR2 = - 4 A in the first equation to get:

IR1 = - 1.2307 A

or IR1 = 1.2307 A and it flows to the right.

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