Circuit Analysis and Measurement
Resistors
Circuit Identification
Electrical Components+Devices
Campus Trivia
1
How do you connect ammeter in a circuit? (30s)
In Series
1
How should you connect two resistors to get the largest and smallest equivalent resistances? (30s)
Largest: In Series
Smallest: In Parallel
1
Which circuit will have an IV graph as shown? (30s)
Resistor with a voltage source
1
Identify the following four electrical components (45s)
Inverter, Capacitor, NMOS (with terminals), BJT (with terminals)
1
What arena does the Illini Basketball team play in for home games?
State Farm Center
2
Solve for the P_avg for this circuit (1m 30s)
35 W
2
Calculate the diameter of a copper wire needed to give a resistance of 400 Ohms. Length of wire =5 miles and resistivity of copper is 1.7x10^-8Ω m (1m 30s)
Diameter=0.66 mm
2
What component has a IV graph as shown? (30s)
Zener Diode
Original picture source (edited for the game):http://www.learningaboutelectronics.com/Articles/Zener-diode-IV-characteristics-curve
2
Describe a parallel-plate capacitor and how it functions as a capacitor (1m)
Keywords/phrases: 2 metal plates with dielectric between them. Positive charge on one plate and negative charge on the other=> Potential difference => Current through the load (resistor)
2
What is the name of the ECE Illinois alumni who invented integrated circuits? (30s)
Jack Kilby
3
Calculate the net power supplied/absorbed by each of the following components in the circuit. (1m 30s)
-16W, 32W, 24W, -88W, 48W
3
Why are resistors called passive components? (30s)
Because resistors cannot control current and do not have internal gain (unlike Op-Amps or BJT's).
3
This is the circuit implementation of which electrical operation? (1m)
Inverting input signal A
3
What is the condition for the transistor pair to be 'ON'? (1m)
Using Input KVL: Vin=1.4 V
3
What is the name of the Illinois faculty who is the only person to win two Nobel Prizes in Physics? (30s)
John Bardeen
4
Find the Thevenin equivalent of the circuit (2m)
R_T = 18 ohms, V_T = 13.3 V
4
Calculate the equivalent resistance between points A and B (2m)
Req = 170/7 Ω
4
What is the name of this circuit and what does it do? (1m)
Wheatstone Bridge. It is sensitive to small changes in the resistor values and hence can be used to measure low resistance values.
4
What do you think the IV of this circuit look like? (2m)
Similar to the IV of a Zener Diode!
4
Which Illinois alumnus and Professor invented the LED? (30s)
The late Nick Holonyak Jr.
5
Solve for the output voltage of this circuit in terms of input voltage. (2m)
-1/(RC)*integral Vs(t)
5
Derive the condition for the situation when only the current source is supplying power.
0 < V_s < 20
5
What operation does this circuit perform? (2m)
It performs XOR, i.e. if both inputs are the same, output 0, else 1.
5
For the Schmitt Trigger Oscillator, draw Vin vs. time and Vout vs. time on the same graph (2m)
5
What is the name of the statue in front of the Nick Holonyak Micro and Nanotechnology Laboratory?
"The Quintessential Engineer," a.k.a. "Quinn"