PHYSICS 3K03 Lecture Notes - Lecture 13: Circuit Diagram, Electric Field, Bipolar Junction Transistor
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22 Jun 2018
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Bi-polar Junction Transistor
Diagrams
- Arrow in
circuit
diagram
represents a
pn junction
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Consider the junction of three wires as shown in the diagram.
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 |
What is the current I3 in wire 3? (Current out of the junction positive and current into the junction negative).