Elenco Electronic Component Kit Manual de usuario descargar pdf (Pagina 21)

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SEMICONDUCTORS

SELF TEST

1. The diode is best described as:

a) Switch c)

Electrical Storage Device

b) Check Valve d) Electrical Momentum

2. A silicon diode begins to conduct current at

approximately:

a) 7 volts c) 0.7 lb.

b) 0.7 volts d) 7 lbs.

3. NPN transistors have:

a) 2 leads c) 2 diodes

b) 3 leads d) b & c

4. NPN and PNP transistors are used to:

a) Create Power c) Control Current

b) Change Resistance d) Control Capacitance

5. The ratio of collector current to base current in a

transistor is called:

a) Beta (β) c) Current Control

b) Amplification d) FET

6. A diode made of Gallium Arsenide is called:

a) Zener Diode c) LED

b) Power Diode d) Detector Diode

7. A Field Effect Transistor controls Source to Drain

current by:

a) Diode Conduction c) Base Voltage

b) Base Current d) Gate Diode

8. A Zener Diode is used as:

a) Voltage Reference c) Resistance Control

b) Current Reference d) b & c

9. An Integrated Circuit contains:

a) Diodes and Resistors c) Inductors

b) Transistors and Small d) a & b

Capacitors

10. If the arrow in the symbol for a transistor points

toward the base lead, the transistor is a:

a) NPN Transistor c) FET Transistor

b) PNP Transistor

THEORY

Circle the letter that best fits the description.

PRACTICE

Open the Semiconductor bag and answer the following questions.

EXTRA CREDIT

Connect the LED (light emitting diode) to a 9 volt battery

(not provided) as shown in Figure 33. Why is the resistor

necessary? If the LED does not light up reverse the

battery leads. Why does the LED only light when

connected a certain way?

Figure 33

How many of the devices are diodes? __________

How many of the devices look like transistors? __________

How many integrated circuits are included? __________

Was a Light Emitting Diode included? __________

How are the diodes marked to show which end current will not go into? __________

Twisted

Leads

LED

1000Ω

Resistor

Battery

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 27 28

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Elenco Electronic Component Kit Manual de usuario Pagina 21

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