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.
where A is the amplitude of the sinusoid (in volts) and f is the frequency (in Hz).
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
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