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(PHY 156) Physics II- Lab 7 RC Circuits

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  • UniversityCollege of Staten Island CUNY
  • CoursePhysics II (PHY 156)

Rc Circuits
Course: PHY156
Section: 12919
Student Name: Gamoi Paisley
Lab Partner: Sarahi Marquez, Emmanuela Tanis
Date: 10/24/2017
Objective:
To examine the charging and discharging process of capacitors in a RC circuit and determine their time
constants (τ).
Physical Principle:
All RC and DC circuits contain a source of electromotive force (battery), resistors, and capacitors.
However, in contrast to DC circuits without capacitors, the currents of RC circuits take some time to
reach their constant values. This time is the time needed to charge the capacitors within RC circuits and
is known as the time constant τ. For a basic RC circuit containing one resistor of resistance ‘R’, one
capacitor of capacitance ‘C’ and one source of electro motive fore ‘ ’, the Ɛ time constant can be
expressed using the following equation:
τ=R∙C
During the charging process the voltage across the capacitor Vc increases with time t from zero to Ɛ. The
voltage across the capacitor can be determined using the following equation:

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(PHY 156) Physics II- Lab 7 RC Circuits

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