Consider the juncion of three wires as shown in the diagram

Subject:PhysicsPrice:2.85 Bought3

Share With

Consider the juncion of three wires as shown in the diagram. (Figure 1)

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.

 

Wire	Current density (A/mm2)	Diameter (mm)
1	3.1	1.6
2	4.9	2.8

 

Find the current I3 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.