Question 1

A pn-junction diode conducts when the arrow in the schematic symbol

Accepted Answer

A)  points to the more negative diode potential. 
B)  points to the more positive diode potential. 
A)  points to the more negative diode potential. 
B)  points to the more positive diode potential. A

Question 2

-Symbols A, B, and C represent the , respectively.

Accepted Answer

A)  LED, zener diode, and pn-junction diode 
B)  zener diode, pn-junction diode, and LED 
C)  photo diode, zener diode, and LED 
D)  LED, pn-junction diode, and zener diode 
A)  LED, zener diode, and pn-junction diode 
B)  zener diode, pn-junction diode, and LED 
C)  photo diode, zener diode, and LED 
D)  LED, pn-junction diode, and zener diode D

Question 3

-Which of the following is most likely to destroy a zener diode?

Accepted Answer

A)  Exceeding VBR 
B)  Exceeding IZM 
A)  Exceeding VBR 
B)  Exceeding IZM B

Question 4

A calculated value is generally considered to be accurate enough when it is within

Accepted Answer

A)  20% of the measured value. 
B)  15% of the measured value. 
C)  10% of the actual value. 
D)  5% of the actual value. 
A)  20% of the measured value. 
B)  15% of the measured value. 
C)  10% of the actual value. 
D)  5% of the actual value.

Question 5

The p-type material of a diode is called the

Accepted Answer

A)  anode. 
B)  cathode. 
A)  anode. 
B)  cathode.

Question 6

Which of the following steps should be taken when testing a diode with an ohmmeter?

Accepted Answer

A)  The ohmmeter should be calibrated using the zero adjust when applicable). 
B)  The relative polarity of the meter leads should be checked. 
C)  The meter output current level for each resistance scale should be verified as being safe for the diode under test. 
D)  All of the above. 
A)  The ohmmeter should be calibrated using the zero adjust when applicable). 
B)  The relative polarity of the meter leads should be checked. 
C)  The meter output current level for each resistance scale should be verified as being safe for the diode under test. 
D)  All of the above.

Question 7

A zener diode is designed to operate in the region of its characteristic curve.

Accepted Answer

A)  forward operating 
B)  reverse breakdown 
C)  zero bias 
A)  forward operating 
B)  reverse breakdown 
C)  zero bias

Question 8

The anode and cathode leads on an LED are usually identified by

Accepted Answer

A)  their color. 
B)  their lengths. 
C)  a marking on the LED case. 
D)  their lengths and/or a marking on the LED case. 
A)  their color. 
B)  their lengths. 
C)  a marking on the LED case. 
D)  their lengths and/or a marking on the LED case.

Question 9

Conventional current through a forward-biased pn junction is

Accepted Answer

A)  from cathode to anode. 
B)  from anode to cathode. 
A)  from cathode to anode. 
B)  from anode to cathode.

Question 10

The diode model is typically used in the initial stages of troubleshooting.

Accepted Answer

A)  ideal 
B)  practical 
C)  complete 
A)  ideal 
B)  practical 
C)  complete

Question 11

-What is the value of IT for the circuit in Figure ?

Accepted Answer

A)  3 mA 
B)  1 mA 
C)  5 mA 
D)  12 mA 
A)  3 mA 
B)  1 mA 
C)  5 mA 
D)  12 mA

Question 12

- The driving circuit has a peak output of 6 V. What value of RS will protect the LED from excessive forward current?

Accepted Answer

A)  470 Ω 
B)  560 Ω 
C)  680 Ω 
D)  Any of the resistors listed will protect the LED. 
A)  470 Ω 
B)  560 Ω 
C)  680 Ω 
D)  Any of the resistors listed will protect the LED.

Question 13

-The voltage across the resistor in Figure is

Accepted Answer

A)  5 V. 
B)  4.3 V. 
C)  0.7 V. 
D)  0 V. 
A)  5 V. 
B)  4.3 V. 
C)  0.7 V. 
D)  0 V.

Question 14

Electron flow through a forward-biased pn junction is

Accepted Answer

A)  from cathode to anode. 
B)  from anode to cathode. 
A)  from cathode to anode. 
B)  from anode to cathode.

Question 15

-The voltage across a resistor is calculated as being 4 V. The measured value of the voltage is 4.3 V. What is the percent of error between the two values?

Accepted Answer

A)  6.98% 
B)  7.5% 
C)  0.698% 
D)  0.075% 
A)  6.98% 
B)  7.5% 
C)  0.698% 
D)  0.075%

Question 16

A zener diode has the following ratings: VZ = 9.1 V and IZT = 20 mA. The measured value of VZ changes by 30 mV when Izt = 2 mA. What is the value of ZZ for the device?

Accepted Answer

A)  1.5 Ω 
B)  15 Ω 
C)  30 Ω 
D)  3.0 Ω 
A)  1.5 Ω 
B)  15 Ω 
C)  30 Ω 
D)  3.0 Ω

Question 17

A given LED has a maximum forward current rating of 30 mA. You should use IF = to calculate the value of the current-limiting resistor.

Accepted Answer

A)  30 mA 
B)  24 mA 
C)  36 mA 
D)  20 mA
Chapter 2 Diodes Answer Key 
A)  30 mA 
B)  24 mA 
C)  36 mA 
D)  20 mA
Chapter 2 Diodes Answer Key

Question 18

A maximum rating on a spec sheet is a

Accepted Answer

A)  quality. 
B)  limit. 
C)  average value. 
D)  ac characteristic. 
A)  quality. 
B)  limit. 
C)  average value. 
D)  ac characteristic.

Question 19

The n-type material of a diode is called the

Accepted Answer

A)  anode. 
B)  cathode. 
A)  anode. 
B)  cathode.

Question 20

The ideal model of a pn-junction diode represents the device as a

Accepted Answer

A)  switch. 
B)  switch in series with a battery. 
C)  switch in series with a battery and a resistor. 
A)  switch. 
B)  switch in series with a battery. 
C)  switch in series with a battery and a resistor.

Exam 2: Diodes

A pn-junction diode conducts when the arrow in the schematic symbol

-Symbols A, B, and C represent the , respectively.

-Which of the following is most likely to destroy a zener diode?

A calculated value is generally considered to be accurate enough when it is within

The p-type material of a diode is called the

Which of the following steps should be taken when testing a diode with an ohmmeter?

A zener diode is designed to operate in the region of its characteristic curve.

The anode and cathode leads on an LED are usually identified by

Conventional current through a forward-biased pn junction is

The diode model is typically used in the initial stages of troubleshooting.

-What is the value of IT for the circuit in Figure ?

- The driving circuit has a peak output of 6 V. What value of RS will protect the LED from excessive forward current?

-The voltage across the resistor in Figure is

Electron flow through a forward-biased pn junction is

-The voltage across a resistor is calculated as being 4 V. The measured value of the voltage is 4.3 V. What is the percent of error between the two values?

A zener diode has the following ratings: VZ = 9.1 V and IZT = 20 mA. The measured value of VZ changes by 30 mV when Izt = 2 mA. What is the value of ZZ for the device?

A given LED has a maximum forward current rating of 30 mA. You should use IF = to calculate the value of the current-limiting resistor.

A maximum rating on a spec sheet is a

The n-type material of a diode is called the

The ideal model of a pn-junction diode represents the device as a

Fundamental Solid-State Principles

Common Diode Applications: Basic Power Supply Circuits

Common Diode Applications: Clippers, Clampers, Voltage Multipliers, and Displays

Special Applications Diodes

Bipolar Junction Transistors

DC Biasing Circuits

Introduction to Amplifiers

Common-Emitter Amplifiers

Other BJT Amplifiers

Power Amplifiers

Field-Effect Transistors

Mosfets

Amplifier Frequency Response

Operational Amplifiers

Additional Op-Amp Applications

Tuned Amplifiers

Oscillators

Solid-State Switching Circuits

Thyristors and Optoelectronics Devices

Discrete and Integrated Voltage Regulators

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