Question 1

The SCR is turned on by

Accepted Answer

A)  gate voltage. 
B)  increasing anode voltage. 
C)  reducing anode voltage. 
D)  forced commutation. 
A)  gate voltage. 
B)  increasing anode voltage. 
C)  reducing anode voltage. 
D)  forced commutation.

Question 2

When light strikes the gate of the device shown in Figure 13-34(a)

Accepted Answer

A)  +VCC drops to zero. 
B)  RL opens. 
C)  VCC is dropped across RL. 
D)  0 V is dropped across RL. 
A)  +VCC drops to zero. 
B)  RL opens. 
C)  VCC is dropped across RL. 
D)  0 V is dropped across RL.

Question 3

The operation of a thyristor involves positive feedback.

Accepted Answer

A) True 
 B)False

Question 4

A semiconductor device that uses internal feedback to produce switching action is a ________.

Accepted Answer

A)  transistor 
B)  zener diode 
C)  thyristor 
D)  rectifier 
A)  transistor 
B)  zener diode 
C)  thyristor 
D)  rectifier

Question 5

The only way to close a transistor latch circuit is by thermal runaway.

Accepted Answer

A) True 
 B)False

Question 6

The triac acts like two

Accepted Answer

A)  diacs in reverse parallel. 
B)  zeners in reverse parallel. 
C)  SCRs in reverse parallel. 
D)  JFETs in reverse parallel. 
A)  diacs in reverse parallel. 
B)  zeners in reverse parallel. 
C)  SCRs in reverse parallel. 
D)  JFETs in reverse parallel.

Question 7

The programmable unijunction transistor is considered programmable because

Accepted Answer

A)  the gate voltage can be determined by an external voltage divider. 
B)  the gate voltage is programmed using software. 
C)  the anode can be modified by adding resistors. 
D)  the cathode can be modified by adding resistors. 
A)  the gate voltage can be determined by an external voltage divider. 
B)  the gate voltage is programmed using software. 
C)  the anode can be modified by adding resistors. 
D)  the cathode can be modified by adding resistors.

Question 8

A hybrid device that combines the low conduction loss of a BJT with the switching speed of a power MOSFET is

Accepted Answer

A)  a diaC. 
B)  an SCR. 
C)  a D-MOSFET. 
D)  an IGBT. 
A)  a diaC. 
B)  an SCR. 
C)  a D-MOSFET. 
D)  an IGBT.

Question 9

If a high-speed switching transient appears on the supply voltage,its rate of rise can be reduced by using a

Accepted Answer

A)  zener diode 
B)  regulator circuit. 
C)  Schockley diode. 
D)  snubber circuit. 
A)  zener diode 
B)  regulator circuit. 
C)  Schockley diode. 
D)  snubber circuit.

Question 10

IGBTs are effective solutions for

Accepted Answer

A)  low voltage and current applications at moderate frequencies. 
B)  high voltage and current applications at moderate frequencies. 
C)  high voltage and current applications at low frequencies. 
D)  low voltage and current applications at high frequencies. 
A)  low voltage and current applications at moderate frequencies. 
B)  high voltage and current applications at moderate frequencies. 
C)  high voltage and current applications at low frequencies. 
D)  low voltage and current applications at high frequencies.

The SCR is turned on by

When light strikes the gate of the device shown in Figure 13-34(a)

The operation of a thyristor involves positive feedback.

A semiconductor device that uses internal feedback to produce switching action is a ________.

The only way to close a transistor latch circuit is by thermal runaway.

The triac acts like two

The programmable unijunction transistor is considered programmable because

A hybrid device that combines the low conduction loss of a BJT with the switching speed of a power MOSFET is

If a high-speed switching transient appears on the supply voltage,its rate of rise can be reduced by using a

IGBTs are effective solutions for

Introduction

Semoconductors

Diode Theory Key

Diode Circuits

Special-Purpose Diodes Key

BJT Fumdamentals

BJT Biasing

Basic BJT Amplifiers

Multistage,CC,and CB Amplifiers

Power Amplifiers

JFETS

Mosfets

Frequency Effects

Differential Amplifiers

Operational Amplifiers

Negative Feedback

Linear OP AMP Circuits

Active Filters Key

Nonlinear Op-Amp Circuit Applications Key

Oscillators Key

Regulated Power Supplies Key

Filters

Exam 13: Thyristors

The SCR is turned on by

When light strikes the gate of the device shown in Figure 13-34(a)

The operation of a thyristor involves positive feedback.

A semiconductor device that uses internal feedback to produce switching action is a ________.

The only way to close a transistor latch circuit is by thermal runaway.

The triac acts like two

The programmable unijunction transistor is considered programmable because

A hybrid device that combines the low conduction loss of a BJT with the switching speed of a power MOSFET is

If a high-speed switching transient appears on the supply voltage,its rate of rise can be reduced by using a

IGBTs are effective solutions for

Introduction

Semoconductors

Diode Theory Key

Diode Circuits

Special-Purpose Diodes Key

BJT Fumdamentals

BJT Biasing

Basic BJT Amplifiers

Multistage,CC,and CB Amplifiers

Power Amplifiers

JFETS

Mosfets

Frequency Effects

Differential Amplifiers

Operational Amplifiers

Negative Feedback

Linear OP AMP Circuits

Active Filters Key

Nonlinear Op-Amp Circuit Applications Key

Oscillators Key

Regulated Power Supplies Key

Filters