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PHYS117B.02 : Lecture 11 and Lecture 12. EMF, Internal resistance, Power in electric circuit Resistors in series and in parallel. Kirchhoff’s rules. EMF. Electric field and current inside a wire. Open circuit with a source. I = 0 V = e. A source in a complete circuit. I = ? V = ?.
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PHYS117B.02 : Lecture 11 and Lecture 12 EMF, Internal resistance, Power in electric circuit Resistors in series and in parallel. Kirchhoff’s rules J.Velkovska,PHYS117B
EMF J.Velkovska,PHYS117B
Electric field and current inside a wire J.Velkovska,PHYS117B
Open circuit with a source • I = 0 • V = e J.Velkovska,PHYS117B
A source in a complete circuit • I = ? • V = ? J.Velkovska,PHYS117B
A source with a short circuit • I = ? • V = ? J.Velkovska,PHYS117B
Potential graph in a circuit J.Velkovska,PHYS117B
Power in Electric circuit J.Velkovska,PHYS117B
Resistors in series • Same current goes through R1 , R2 ,R3 J.Velkovska,PHYS117B
Resistors in parallel • Same potential difference on all resistors J.Velkovska,PHYS117B
Combinations of 3 resistors • Req =? J.Velkovska,PHYS117B
Example of a complex circuit which can be reduced using equivalent resistance Done on the blackboard J.Velkovska,PHYS117B
Kirchhoff’s rules J.Velkovska,PHYS117B
Sign conventions J.Velkovska,PHYS117B
Single loop circuit: Example 26.3 J.Velkovska,PHYS117B
More complex example 26.4 J.Velkovska,PHYS117B
Bridge circuit ( ex 26.6 – can’t be reduced to Req J.Velkovska,PHYS117B