- #1
Turion
- 145
- 2
Homework Statement
So in the future, I will have to find out what is inside a black box:
A Black Box is actually a grey metal box with two terminals sticking out of it. Inside are two passive components, one is a resistor and the other may be a capacitor or an inductor, and they way they are connected may be either in series or in parallel. The point of the test is to use a multimeter, a function generator, and an oscilloscope to determine what components are inside, how they are connected, and their values, to within about 10%. There are four possible cases; RC-series, RC-parallel, RL-series and RL-parallel.
Homework Equations
The Attempt at a Solution
Here is the solution to it: http://drunkenengineer.tripod.com/Year1/ele202/blackbox/blackbox.html
The issue is that I'm having trouble understanding why the guide uses those techniques/tests.
I understand the ohmmeter test. The reason why the ohmmeter would give a reading of infinity if it is a rc-series box is because capacitors act as open circuits to DC.
Questions:
- Phase Shift Test: we have to make a circuit. It consists of a signal generator, an oscilloscope, a black box, and the attached symbol. The attached symbol is just a signal generator, right? And functions generators are the same as signal generators, right? The shape of the circuit looks weird. What is the motive behind the circuit designed like this?
- Inductor test: I don't understand the circuit diagram. A and B are two different channels, right? So where would the other ends of the channels be connected? What is the motive behind the circuit designed like this?