5/07/2015

Circuit With Resistors, Circuit With Resistor & Inductor, and Circuit With Resistor and Capacitor

Today we did a lab that involved analyzing different circuit elements when AC is supplied. These circuits include a circuit with resistors, circuit with resistor & inductor, and a circuit with resistor and capacitor.

Results 

Above are our results and calculations. We used a 47 Ω (R1) in each circuit. For the resistor circuit we used a 100 Ω resistor in series with the R1. For the inductor circuit we used a 1uH inductor in series with R1. Lastly, we used a 0.1uF capacitor in series with R1. In the resistor circuit we showed that both the current and voltage are in phase when an AC is supplied. In the inductor circuit the voltage leads the current by 90°. In the capacitor circuit the current leads voltage by 90°. each circuit was supplied an AC of 2V with different frequencies of 1kHz, 5kHz, and 10 kHz frequencies.

Resistor Circuit at 1kHz Freqeuncy 

Resistor Circuit at 5kHz Freqeuncy

Resistor Circuit at 10kHz Freqeuncy 

Summary;

Today, we analyzed circuits supplied with AC. We found that a resistor circuit supplied with AC has no phase change between the voltage and current. The voltage leads the current by 90° in a circuit with an inductor and the current leads the voltage by 90° in a circuit with a capacitor. We also learned that circuit elements also produce impedance. To calculate the impedance for a resistor, inductor or a capacitor, we use the formulas below. We can find the total impedance of a circuit by first calculating the impedance of each circuit element and treating them as resistors, where the add inversely in parallel and add directly in series.