Procedure
and Tasks of the scope

**Measurement of an unknown inductance in an R-L circuit**

The task of this experiment is to become
familiar with the potential of an oscilloscope.

·
Build on the
breadboard an R-L with R=100W and and
unknown inductor. Connect the resistor with ground.

·
Connect the
wave-function generator with the R-L circuit, ground to the open end of R.

·
Connect the
resistor with channel 1 of the scope and the full R-L with channel 2.

·
Vary the
frequency of the generator in steps of 0.2MHz up to on MHz and measure the
amplitudes on channel 1 and 2 and the relative phase.

·
Calculate the
real and imaginary part of L and plot both versus the inverse frequency.

The relative phase is obtained from the
displacement between the two sinus curves. This displacement
together with the period determine the phase shift between the two
signals. From the initial slope of the imaginary part determine the inductance
L of the inductor