1 / 8

17.7 Capacitance

17.7 Capacitance Ratio of the charge on a conductor to the potential difference between the conductors. Units of farads (F) Usually in μ F or pF (10 -12 F). 17.7 Capacitance For a parallel-plate capacitor: Applications: cameras, computers, TVs, noise filters, starter motors, etc.

kory
Télécharger la présentation

17.7 Capacitance

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 17.7 Capacitance • Ratio of the charge on a conductor to the potential difference between the conductors. • Units of farads (F) • Usually in μF or pF (10-12 F) APHY202

  2. 17.7 Capacitance • For a parallel-plate capacitor: • Applications: cameras, computers, TVs, noise filters, starter motors, etc. APHY202

  3. 17.8 Dielectrics • An insulating material placed between plates of a capacitor that increases the capacitance: C = κCo • The polarization of the dielectric will cause an decrease in the electric field. • Application: measure humidity in air APHY202

  4. 17.9 Storage of Electric Energy • Work done to move Δq through V is ΔW= VΔq • Total work = ½QV • PE stored = ½QV = ½CV2 = Q2/2C • The energy is stored in the electric field between the plates with a density of ½ εoE2. • Defibrillators APHY202

  5. 17.9 Storage of Electric Energy 1) Battery Compartment 10 2) Capacitor 3 7 3) Transformer 4) Capacitor 11 5) Diode 1 6) Transformer 4 6 7) Neon Indicator Light 8 8) Capacitor 9 9) Resistor 2 10) Flash Tube 5 11) Transistors APHY202

  6. 17.11 The Electrocardiogram • Cell area ~ 105 m2 • Charge per surface ~ 10-8 C • Depolarization APHY202

  7. 17.11 The Electrocardiogram APHY202

  8. APHY202

More Related