Question 1

Figure 1
-Refer to Figure 1. If R2 is replaced with a short (0 ▲), the output voltage will be

Accepted Answer

A) 3.5 V 
B) 5.1 V 
C) 0 V 
D) none of the above 
A) 3.5 V 
B) 5.1 V 
C) 0 V 
D) none of the above

Question 2

A shunt regulator does not use negative feedback.

Accepted Answer

A) True 
 B)False

Question 3

An LM 337 is

Accepted Answer

A) an adjustable negative output regulator 
B) an adjustable positive output regulator 
C) a fixed positive output regulator 
D) a fixed negative output regulator 
A) an adjustable negative output regulator 
B) an adjustable positive output regulator 
C) a fixed positive output regulator 
D) a fixed negative output regulator

Question 4

Figure 2
-Refer to Figure 2. Assume the input increases by 0.45 V. As a result, the current in Q1 will increase by about

Accepted Answer

A) 1.0 mA 
B) 1.5 mA 
C) 0.5 mA 
D) 2.0 mA 
A) 1.0 mA 
B) 1.5 mA 
C) 0.5 mA 
D) 2.0 mA

Question 5

The ADP1612/ADP1613 IC switching regulator has 2 selectable switching frequencies. The higher frequency is selected for

Accepted Answer

A) greater output voltage range 
B) higher efficiency 
C) smaller external components 
D) all of the above 
A) greater output voltage range 
B) higher efficiency 
C) smaller external components 
D) all of the above

Question 6

Figure 1
-Refer to Figure 1. Current limiting is at an output current of

Accepted Answer

A) 3.5 A 
B) 1.0 A 
C) 0.5 A 
D) 2.0 A 
A) 3.5 A 
B) 1.0 A 
C) 0.5 A 
D) 2.0 A

Question 7

Figure 3 Assume ideal components.
-Refer to Figure 3. The purpose of diode D1 is to

Accepted Answer

A) prevent overshoots from affecting the output 
B) prevent negative pulses from affecting the output when Q1 is ON 
C) prevent the capacitor from discharging through the transistor 
D) provide a current path for load current when Q1 is OFF 
A) prevent overshoots from affecting the output 
B) prevent negative pulses from affecting the output when Q1 is ON 
C) prevent the capacitor from discharging through the transistor 
D) provide a current path for load current when Q1 is OFF

Question 8

Shunt regulators are

Accepted Answer

A) electrically noisy 
B) simple 
C) efficient 
D) all of the above 
A) electrically noisy 
B) simple 
C) efficient 
D) all of the above

Question 9

An ideal power supply has a Thevenin resistance of zero ohms.

Accepted Answer

A) True 
 B)False

Question 10

Linear regulators do not require a pulse width modulator.

Accepted Answer

A) True 
 B)False

Question 11

Figure 1
-Refer to Figure 1. The output voltage is approximately

Accepted Answer

A) 8.3 V 
B) 6.8 V 
C) 10 V 
D) 12 V 
A) 8.3 V 
B) 6.8 V 
C) 10 V 
D) 12 V

Question 12

Figure 5
-Refer to Figure 5. The purpose of Qext and Rext is to

Accepted Answer

A) provide current limiting 
B) convert the 78XX to a current source 
C) both A and B 
D) none of the above 
A) provide current limiting 
B) convert the 78XX to a current source 
C) both A and B 
D) none of the above

Question 13

Figure 3 Assume ideal components.
-Refer to Figure 3. A disadvantage of this type of regulator is that

Accepted Answer

A) the pass transistor tends to be very hot 
B) it generates electromagnetic interference (EMI) 
C) it has poor load regulation 
D) all of the above 
A) the pass transistor tends to be very hot 
B) it generates electromagnetic interference (EMI) 
C) it has poor load regulation 
D) all of the above

Question 14

To regulate properly, the input voltage to a 7805 must be equal or greater than

Accepted Answer

A) 10.0 V 
B) 6.5 V 
C) 5.5 V 
D) 7.5 V 
A) 10.0 V 
B) 6.5 V 
C) 5.5 V 
D) 7.5 V

Question 15

Figure 3 Assume ideal components.
-Refer to Figure 3. Assume the regulator is 80% efficient when VIN =+18 V and VOUT = +12 V. The input current is approximately

Accepted Answer

A) 320 mA 
B) 750 mA 
C) 2.0 A 
D) 500 mA 
A) 320 mA 
B) 750 mA 
C) 2.0 A 
D) 500 mA

Figure 1 -Refer to Figure 1. If R2 is replaced with a short (0 ▲), the output voltage will be

A shunt regulator does not use negative feedback.

An LM 337 is

Figure 2 -Refer to Figure 2. Assume the input increases by 0.45 V. As a result, the current in Q1 will increase by about

The ADP1612/ADP1613 IC switching regulator has 2 selectable switching frequencies. The higher frequency is selected for

Figure 1 -Refer to Figure 1. Current limiting is at an output current of

Figure 3 Assume ideal components. -Refer to Figure 3. The purpose of diode D1 is to

Shunt regulators are

An ideal power supply has a Thevenin resistance of zero ohms.

Linear regulators do not require a pulse width modulator.

Figure 1 -Refer to Figure 1. The output voltage is approximately

Figure 5 -Refer to Figure 5. The purpose of Qext and Rext is to

Figure 3 Assume ideal components. -Refer to Figure 3. A disadvantage of this type of regulator is that

To regulate properly, the input voltage to a 7805 must be equal or greater than

Figure 3 Assume ideal components. -Refer to Figure 3. Assume the regulator is 80% efficient when VIN =+18 V and VOUT = +12 V. The input current is approximately

Introduction to Semiconductors

Diodes and Applications

Special-Purpose Diodes

Bipolar Junction Transistors

Transistor Bias Circuits

BJT Amplifiers

BJT Power Amplifiers

Field-Effect Transistors Fets

Fet Amplifiers and Switching Circuits

Amplifier Frequency Response

Thyristors

The Operational Amplifier

Basic Op-Amp Circuits

Special-Purpose Integrated Circuits

Active Filters

Oscillators

Communication Devices and Methods

Filters

Exam 17: Voltage Regulators

Figure 1 -Refer to Figure 1. If R2 is replaced with a short (0 ▲), the output voltage will be

A shunt regulator does not use negative feedback.

An LM 337 is

Figure 2 -Refer to Figure 2. Assume the input increases by 0.45 V. As a result, the current in Q1 will increase by about

The ADP1612/ADP1613 IC switching regulator has 2 selectable switching frequencies. The higher frequency is selected for

Figure 1 -Refer to Figure 1. Current limiting is at an output current of

Figure 3 Assume ideal components. -Refer to Figure 3. The purpose of diode D1 is to

Shunt regulators are

An ideal power supply has a Thevenin resistance of zero ohms.

Linear regulators do not require a pulse width modulator.

Figure 1 -Refer to Figure 1. The output voltage is approximately

Figure 5 -Refer to Figure 5. The purpose of Qext and Rext is to

Figure 3 Assume ideal components. -Refer to Figure 3. A disadvantage of this type of regulator is that

To regulate properly, the input voltage to a 7805 must be equal or greater than

Figure 3 Assume ideal components. -Refer to Figure 3. Assume the regulator is 80% efficient when VIN =+18 V and VOUT = +12 V. The input current is approximately

Introduction to Semiconductors

Diodes and Applications

Special-Purpose Diodes

Bipolar Junction Transistors

Transistor Bias Circuits

BJT Amplifiers

BJT Power Amplifiers

Field-Effect Transistors Fets

Fet Amplifiers and Switching Circuits

Amplifier Frequency Response

Thyristors

The Operational Amplifier

Basic Op-Amp Circuits

Special-Purpose Integrated Circuits

Active Filters

Oscillators

Communication Devices and Methods

Filters