11/16/17 Ch 9 Problems

11/14/17 Inductor Voltage - Current Relations

Inductor Voltage - Current Relations 

Overview 

We will measure the relationship between the voltage difference across an inductor and the current passing through it.

given circuit diagram 

Pre-Lab 

Mathematically, the form of the inductor current will be: iL (t) = A cos(2,ft)
where A is the amplitude of the sinusoid (in volts) and f is the frequency (in Hz).

Use the inductor voltage-current relations to calculate the inductor voltage resulting from application of the
voltage of equation.

L = 1mH

R = 100 ohm

1kHz 

2kHz

Lab Procedure 

Build Circuit. 

Use channel 1 of your oscilloscope to measure the resistor voltage difference, and channel 2 of your oscilloscope to measure the inductor voltage difference.

Circuit 

1kHz

1. Apply a sinusoidal input voltage with frequency = 1kHz, amplitude = 2V, and offset = 0V to the circuit. 

V(in) is the blue sinusoidal wave and V(out) is the yellow wave.

2kHz 

2. Apply a sinusoidal input voltage with frequency = 2kHz, amplitude = 2V, and offset = 0V to the circuit. 

V(in) is the blue sinusoidal wave and V(out) is the yellow wave.

Animation at 1kHz

Animation of Voltage at Source, Resistor, and Inductor on EveryCircuit on GIPHY