Day 25 Inductance, RL Circuits

At the beginning of the class, inductance is introduced to us. This picture shows that any change in the current through an inductor leads to a change in the magnetic field it produces.

This is the current vs. time graph when an inductor presents in the circuit.

The professor gave us a 100 ohm resistor that has brown, black, and brown pattern on it. 

Then we calculated the inductance by the formula shown in the picture.

We also calculated the time constant τ = 5.1*10^-6 s.

This τ is given by professor which is 2.55*10^-5 s

In this picture, we started to do an experiment on the Oscilloscope

We set up the functional generator and make it display the graph in the right picture

Then we calculated the inductance by two different equations. By the top equation, we got 760 mH, and by the bottom method, we got 736 mH

Then we were introduced to a LR circuit problem

We solved for resistance, τ , current, voltage, and energy of the circuit.

Conclusion

For today's class, we learned about inductance, oscilloscope, and LR circuit. We did experiments and problems to get used to them.