Complete Electronics Self-Teaching Guide with Projects

Self-Test

The following questions test your understanding of this chapter. Use a separate sheet of paper for your diagrams or calculations. Compare your answers with the answers that follow the test.

1. Draw the circuit symbol for a diode, labeling each terminal. _____

2. What semiconductor materials are used in the manufacture of diodes? _____

3. Draw a circuit with a battery, a resistor, and a forward-biased diode. _____

4. What is the current through a reverse-biased perfect diode? _____

5. Draw a typical V-I curve of a forward-biased diode. Show the knee voltage. _____

6. What is the knee voltage for silicon? _____

Germanium? _____

7. In the circuit shown in Figure 2.36, V_S = 10 volts and R = 100 ohms. Find the current through the diode, assuming a perfect diode. _____

Figure 2.36

8. Calculate question 7 using these values: V_S = 3 volts and R = 1 kΩ. _____

9. In the circuit shown in Figure 2.37, find the current through the diode.

V_S = 10 volts

R₁ = 10 kΩ

R₂ = 1 kΩ

_____

Figure 2.37

10. In the circuit shown in Figure 2.38, find the current through the zener diode.

V_S = 20 volts

V_Z = 10 volts

R₁ = 1 kΩ

R₂ = 2 kΩ

_____

Figure 2.38

11. If the supply voltage for ...