Magical Mystery Circuits II.pdf

Magical Mystery Circuits II.pdf - Magical Mystery Circuits...

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Unformatted text preview: Magical Mystery Circuits II Dr. Wilde To test your black boxes, you have devised two test apparatuses. This time, in addition to the following five circuits: your circuit could also be a voltage source in series with a resistor: The analysis of this circuit is done using KVL: : − !"#! + !"#! + ! = 0 !"#! = !"#! + ! = 0 The I-­‐V graph of this circuit is a line of slope R, passing the point (0, Vs). Of course, the resistance R cannot be negative. You perform two tests on each of the ten boxes. The table below summarizes the tests you made and what you recorded from the voltmeter and ammeter. Use your results to determine what is in each box. Fill in the table with your conclusions about what is in each box. Be sure to include units with your values. (The new voltage source-­‐resistor box will need two values, one for Vs and one for R). Black Box Test Values read Contents of Component Apparatus from meters Black Box Value + Units Used for each test: (vtest , itest) 1 Voltage (10V, 0A), Controlled (5V, −2A) 2 Voltage (15V, 0A), Controlled (20V, 1.25A) 3 Voltage (0V, 0A), Controlled (1V, 250mA) 4 Voltage (0V, 1mA), Controlled (10V, 1mA) 5 Voltage (0V, 0A), Controlled (1V, 125mA) 6 Current (6V, 0A), Controlled (6V, 1A) 7 Current (12V, 0A), Controlled (20V, 1A) 8 Current (14V, 1mA), Controlled (12V, −1mA) 9 Current (6.5V, 0A), Controlled (0V, −1mA) 10 Current (0V, 0A), Controlled (0V, 1A) ...
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