 # ECET 110 ECET110 Week 6 iLab Solution

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ECET 110 Week 6 iLab Transient Analysis of a Resistor-Inductor Circuit

1.     OBJECTIVES

1. Perform a transient analysis on a Resistor-Capacitor circuit, and measure capacitor charge

and discharge times.

1. Determine the steady state values of current, voltage, and the time constants for a Resistor-Capacitor circuit.

PARTS LIST

Equipment:

IBM PC or Compatible

DC Power Supply

DMM (Digital Multimeter)

Oscilloscope

Parts:

1 – 10kW Resistor (color bands = brown, black, orange, gold), ¼ W

1 - 100μF electrolytic capacitor

1 – Breadboard and hookup wires

Software:

Multisim

III.      PROCEDURE:

1. Theoretical calculations of the time constant, voltage, current, and the duration the transients last for the sample RC circuit given in Fig. 6.1 below.

___________________________

1. For this question, assume that you are using Figure 6.1 but that the value or R and C are unknown. Assume the time constant for the circuit is 10 ms (milliseconds). If the new R is half of the original R and capacitor C is increased by 10 times, calculate the new time constant.
2. Using the exponential formula for a charging circuit and assuming an initial voltage of zero volts across the capacitor, calculate the voltage across the capacitor at

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