Phys2212_30.6+to+30.7

Phys2212_30.6+to+30.7 - Physics 2212 Electricity and...

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

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Physics 2212 Electricity and Magnetism Lecture 13 (Knight: 30.6 and 30.7) Capacitance and Capacitors Physics 2212 - Lecture 13 Combining Capacitors Parallel: Same D V, but different Qs. Series: Same Q, but different D Vs. 1 2 3 parallel C C 1 2 3 Q Q Q Q C V V C C C + + + = = = + + + L L ( 29 ( 29 ( 29 series C 1 2 3 1 2 3 1 2 3 1 2 3 1 / / / 1 || || || 1/ 1/ 1/ Q Q C V V V V V Q V Q V Q C C C C C C = = + + + = + + + = + + + L L L L Physics 2212 - Lecture 13 Reminder: Combining Resistors R net 1 2 3 Series Connection [ L]: net R R R R = + + 1 2 3 Parallel Connection [ (1/A)]: 1 1 1 1 net R R R R = + + R net I Conducting material that carries current across its length can form a resistor , a circuit element characterized by an electrical resistance R: R r L/A where L is the length of the conductor and A is its cross sectional area. R has units of ohms . Multiple resistors may be combined in series , where resistances add, or in parallel , where inverse resistances add. Physics 2212 - Lecture 13 Example : A Capacitor Circuit Find the charge and potential difference across each capacitor shown in the figure. C Q C V parallel 1 2 C C C = + 1 2 series 1 2 1 2 1 1/ 1/ C C C C C C C = = + + Physics 2212 - Lecture 13 Energy Stored in a Capacitor 1 U dq V qdq C = = 2 1 C 2 1 Q Q U qdq C C = = 2 1 1 2 C C 2 2 Q U C V C = = Physics 2212 - Lecture 13 Example : Storing Energy in Capacitor How much energy is stored in a 2.0 m F capacitor that has been charged to 5000 V? What is the average power dissipation if the capacitor is discharged in 10 m s?...
View Full Document

Page1 / 27

Phys2212_30.6+to+30.7 - Physics 2212 Electricity and...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online