{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture 8 021110

# Lecture 8 021110 - Chapter 27 Circuits E i V E Unlike the...

This preview shows pages 1–7. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 27 Circuits February 11, 2010 E +- i V E Unlike the electrostatic case, the electric field in the conductor of the figure is not zero. We define as resistivity of the conductor the ratio In vector form: E J J E Resi SI u stivit nit r y fo 2 The conductivity is defined as: Using the previou V/m V m m A/m s equation takes the for 1 m A : J E ρ : Consider the conductor shown in the figure above. The electric field inside the conductor . The current density We substitute and into / equation and get: / V i E J E J L A E V L V A A R J i A i L L L R A L R A E J J E (26 -7) New Concepts:- Kirchhoff’s loop rule- Kirchhoff’s junction rule- Multiloop circuits- Resistors in series- Resistors in parallel- RC circuits, charging and discharging of a capacitor (27 – 1) R i motion- V iR R i motion V iR motion- V +- motion V +- For a move through a resistance in the direction of the current, the change in the potential For a move through a resistance in the direction opposite to that of the current, th V iR Resistance Rule: e change in the potential V iR For a move through an ideal emf device in the direction of the emf arrow, the change in the potential For a move through an ideal emf device in a direction opposi te to that of the V EMF Rule: emf arrow, the change in the potenti al V (27 – 6) iR (27 – 5) Current in a single loop circuit: the overall voltage drop across a closed loop is zero. Consider the circuit shown in the figure. We wish to calculate the potential difference between point b and point a....
View Full Document

{[ snackBarMessage ]}

### Page1 / 16

Lecture 8 021110 - Chapter 27 Circuits E i V E Unlike the...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online