Consider the junction of three wires as shown in the diagram.
Find the magnitude of the current density J3 in wire 3. The diameter of wire 3 is 1.5 mm . Express your answer in amperes per square millimeter to two significant figures.
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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.
What is the current I3Ā in wire 3? (Current out of the junction positive and current into the junction negative).
Consider a junction of five wires, as shown in the figure. The arrows indicate the direction of the current flow. (Figure 1)
The information about the magnitudes of the current density and the diameters for wires 1,2,3, and 4 are given in the table. Some of the values are unknown.
Find the current I5 in wire 5. Express your answer in amperes. Use two significant figures. Assume that the current out of the junction is positive and that the current into the junction is negative.