 The design of the lessons.

## Transistor circuits

We are looking for your characteristics ('the student model'). We test you - here - on beginner, advanced student or an expert in transistor circuits.

### A. Fill in next fields and the form with the 6 mc-questions Look to the scheme with the transistor circuit with the 4 resistors. This circuit amplifies an input signal (ui) to an output signal (uo).

Question 1: Why the transistor circuit needs the two resistors R1 and R2?

• a. for the most optimal amplifier factor
• b. for the best DC voltage on the collector
• c. for the just DC current through the basis
(c)

Question 2: The capacitor CRE (parallel to RE) is necessary?

• a. for a short cut for the DC voltages
• b. because the DC voltage on RE is important for the AC amplifier
• c. because the time constant in the input signal
(b)

Question 3: The capacitor C2 is necessary

• a. because he blocks the output signal
• b. for the just emitter voltage
• c. for setting the DC voltage level in the output signal on 0 volt
(c)

Question 4 (extra): What is DC?

• a. (an) direct current
• b. (an) direct voltage
• c. (an) digital collector-signal
(a)

Question 5 (extra): What is AC?

• a. alternating current voltage
• b. an alternating signal without a DC component
(b)

Question 6 (extra): What is a RC circuit?

• a. a circuit with transistors and resistors
• b. a circuit with resistors and capacitors (without transistors)
• c. a circuit without transistors
(b)

Continue your lessons as beginner here,
Continue your lessons as expert here.

### B. Fill in 9 yes- or no-questions Look to the scheme with the transistor circuit with the 4 resistors. This circuit amplifies an input signal (ui) to an output signal (uo).

• Vraag 1. Do you know what AC is?
• Vraag 2. Do you know what Atoommodel is?
• Vraag 3. Do you know what Basis b is?
• Vraag 4. Do you know what Collector c is?
• Vraag 5. Do you know what DC is?
• Vraag 6. Do you know what Geleider(s) is? xxx
• Vraag 7. Do you know what Materie is?
• Vraag 8. Do you know what Ohm is?
• Vraag 9. Do you know what Schakeling is?

1: 2: 3: 4: 5: 6: 7: 8: 9:

Als vraag 9 is ja: A circuit of R's, C's and a transistor
Als vraag 5 is ja: A transistor in a RC circuit
Als vraag 3 en 4 zijn ja: Simulation of a transistor circuit
Als vraag 6 en 7 zijn no: History of the transistor

Continue your lessons as de vragen .... en ... zijn ... dan staat hier iets voor beginner,
Continue your lessons as de vragen .... en ... zijn ... dan staat hier iets voor advanced student,
Continue your lessons as de vragen .... en ... zijn ... dan staat hier iets voor expert.

Enschede, nieuwe versie febr. 2020