The magnitudes of the current density and the diameters for wires 1 and 2 are gi
ID: 1581278 • Letter: T
Question
The magnitudes of the current density and the diameters for wires 1 and 2 are given in the table. The current directions are indicated by the arrowS Consider the juncion of three wires as shown in the diagram. (Figure 1) Current density (A/mm2) 3.4 3.9 Diameter Wire 2.8 Part A Find the current3 in wire 3. Express your answer in amperes to two significant figures. Call current out of the junction positive and current into the junction negative. Figure 1 of 1 View Available Hint(s) Wire 1 Wire 2 Submit Wire 3 Part B This question will be shown after you complete previous question(s).Explanation / Answer
I1 - I2 + I3 = 0
I1 = J A = 3.4 * (pi * (1.4/2)2) = 5.23 A
I2 = J A = 3.9 * (pi * (2.8/2)2) = 24 A
I3 = 24 - 5.23
current I3 in wire 3 , I3 = 18.78 A
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