1 / 8

RC Circuits

This overview explores RC circuits, focusing on the role of switches and capacitors. A switch controls the open or closed state of a circuit, represented by a break in the schematic symbol. Capacitors store charge and influence voltage and current behavior, following equations such as Q = CV and V = Q/C. During discharge, voltage and current diminish over time according to an exponential curve, never fully reaching zero. The capacitor's behavior adheres to Kirchhoff’s voltage law and exhibits a time constant, which represents the rate of decay, essential for understanding electric circuits.

toan
Télécharger la présentation

RC Circuits

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. RC Circuits

  2. Switches • A circuit can be open or closed. • Different states at different times • A switch controls whether a circuit is open or closed. • The schematic symbol is an angled line showing a break in the circuit.

  3. A capacitor stores charge. Related to voltage Q = CV V = Q/C A switch can be used to complete a circuit with a resistor. Current in circuit Decreases as charge is removed Capacitor Discharge I(t) C R

  4. The voltage and current in a discharging capacitor falls with time. Fractional change is the same Never reaches zero The period of time for a decrease by a factor of e is the time constant t. Time Constant

  5. The discharge of a capacitor can be represented by an exponential curve. Depends on initial voltage Exponential Decay

  6. A capacitor in a circuit behaves like a voltage source. V = Q/C Depends on time A loop with a capacitor follows Kirchhoff’s voltage law. Capacitor Loop I C R

  7. A battery can be used to charge a capacitor. Includes resistance The circuit forms one loop. The capacitor approaches a maximum voltage. V = Q/C Charging Up I(t) R V C

  8. Charge and Discharge • The curves for charging voltage increases while the current decreases. • When potentials match there is no current.

More Related