Question 1

Which of these amplifiers provides a high input resistance and a variable gain?

Accepted Answer

A) open-loop amp 
B) non-inverting amp with a rheostat as Rf. 
C) inverting amp 
D) voltage-follower amp 
A) open-loop amp 
B) non-inverting amp with a rheostat as Rf. 
C) inverting amp 
D) voltage-follower amp

Question 2

To rectify is to convert dc to pulsating ac.

Accepted Answer

A) True 
 B)False

Question 3

The general characteristics of a common-emitter amplifier are high voltage gain, high current gain and no phase reversal between the input and output voltages.

Accepted Answer

A) True 
 B)False

Question 4

If an ohmmeter check of a diode indicates a high resistance in one direction and low resistance in the other, the diode is probably ________.

Accepted Answer

A) open 
B) shorted 
C) bad 
D) good 
A) open 
B) shorted 
C) bad 
D) good

Question 5

$\text { Figure } 17 < 1$
-Which voltage might indicate that the amplifier in Figure  17-1  is cut off?

Accepted Answer

A)   VCE=0 V 
B)  VE=20 V 
C)   VBE=0.7 V 
D)   VC=20 V 
A)   VCE=0 V 
B)  VE=20 V 
C)   VBE=0.7 V 
D)   VC=20 V

Question 6

Amplifiers are electronic circuits that accept an AC input signal and produce an output signal that represents a:

Accepted Answer

A) voltage gain. 
B) power gain. 
C) current gain. 
D) all of these. 
A) voltage gain. 
B) power gain. 
C) current gain. 
D) all of these.

Question 7

$\text { Figure } 16<2$

-If the filter capacitor becomes leaky in Figure 16-2, ________.

Accepted Answer

A)  the ripple voltage will increase 
B)  the output dc will be very low 
C)  a loud hum will be heard 
D)  the diodes would open 
A)  the ripple voltage will increase 
B)  the output dc will be very low 
C)  a loud hum will be heard 
D)  the diodes would open

Question 8

Ripple voltage is caused by the charging and discharging of the diodes.

Accepted Answer

A) True 
 B)False

Question 9

Which one of these amplifiers has high input resistance and low output resistance?

Accepted Answer

A) common-cause 
B) common-current 
C) common-collector 
D) common-emitter 
A) common-cause 
B) common-current 
C) common-collector 
D) common-emitter

Question 10

The purpose of a comparator is to ________.

Accepted Answer

A) detect the occurrence of a changing input voltage 
B) produce a change in output when an input voltage equals a reference voltage 
C) maintain a constant output when the dc inputVoltage changes 
D) amplify an input voltage 
A) detect the occurrence of a changing input voltage 
B) produce a change in output when an input voltage equals a reference voltage 
C) maintain a constant output when the dc inputVoltage changes 
D) amplify an input voltage

Question 11

In an inverting input op-amp integrator suppliedW ith a squareW ave pulse or a step, the output is a:

Accepted Answer

A) opposite phase ramp. 
B) same phase ramp. 
C) opposite phase square Wave. 
D) sine Wave. 
A) opposite phase ramp. 
B) same phase ramp. 
C) opposite phase square Wave. 
D) sine Wave.

Question 12

Figure $18 < 1$
-If $\mathrm { R } _ { f } = 333 \mathrm { k } \Omega$ and $\mathrm { R } _ { \mathrm { i } } = 22 \mathrm { k } \Omega$ in Figure 18-1(b), the voltage gain equals___________

Accepted Answer

A)   15.1 
B)  16 
C)  15 
D)   16.1 
A)   15.1 
B)  16 
C)  15 
D)   16.1

Question 13

On transistor spec sheet, the key difference between $\beta \mathrm { DC }$ and $\alpha \mathrm { DC }$ is that:

Accepted Answer

A)  $\beta \mathrm { DC }$ represents $\mathrm { IE } / \mathrm { IC } ; \alpha \mathrm { DC }$ represents $\mathrm { I_B } / \mathrm { I_C }$ 
B)  $\beta \mathrm { DC }$ represents $\mathrm { IC } / \mathrm { IB } ; \alpha \mathrm { DC }$ represents $\mathrm { I_B } / \mathrm { I } _ { \mathrm { C } }$ 
C)  $\beta \mathrm { DC }$ represents $\mathrm { IC } / \mathrm { IB } ; \alpha \mathrm { DC }$ represents $\text { IC/IE. }$ 
D)  $\beta \mathrm { DC }$ represents $\mathrm { IE } / \mathrm { IC } ; \alpha \mathrm { DC }$ represents $\text { IC/IE. }$ 
A)  $\beta \mathrm { DC }$ represents $\mathrm { IE } / \mathrm { IC } ; \alpha \mathrm { DC }$ represents $\mathrm { I_B } / \mathrm { I_C }$ 
B)  $\beta \mathrm { DC }$ represents $\mathrm { IC } / \mathrm { IB } ; \alpha \mathrm { DC }$ represents $\mathrm { I_B } / \mathrm { I } _ { \mathrm { C } }$ 
C)  $\beta \mathrm { DC }$ represents $\mathrm { IC } / \mathrm { IB } ; \alpha \mathrm { DC }$ represents $\text { IC/IE. }$ 
D)  $\beta \mathrm { DC }$ represents $\mathrm { IE } / \mathrm { IC } ; \alpha \mathrm { DC }$ represents $\text { IC/IE. }$

Question 14

If you measure 0.7 V across a diode, the diode is probably made of ________ and is ________ biased.

Accepted Answer

A) germanium, reverse 
B) silicon, forward 
C) silicon, reverse 
D) germanium, forward 
A) germanium, reverse 
B) silicon, forward 
C) silicon, reverse 
D) germanium, forward

Question 15

The voltage gain of several amplifiers in series is found by adding the individual stage voltage gains.

Accepted Answer

A) True 
 B)False

Question 16

If an op-amp's output increases  8 V  every  12 $\mu \mathrm { s }$
  in response to a step input voltage, the slew rate equals_____

Accepted Answer

A)   0.667  $\mathrm { V } / \mu \mathrm { s }$ 
B)  96 $\mathrm { V } / \mu \mathrm { s }$ 
C)   0.75  $\mathrm { V } / \mu \mathrm { s }$ 
D)   1.5  $\mathrm { V } / \mu \mathrm { s }$ 
A)   0.667  $\mathrm { V } / \mu \mathrm { s }$ 
B)  96 $\mathrm { V } / \mu \mathrm { s }$ 
C)   0.75  $\mathrm { V } / \mu \mathrm { s }$ 
D)   1.5  $\mathrm { V } / \mu \mathrm { s }$

Question 17

Figure $19 < 2$
-If the inputs are -7.1 V and 12 V in Figure 19-2(a),W hat is the output voltage?

Accepted Answer

A) 4.9V 
B) -4.9V 
C) 19.1V 
D) -19.1V 
A) 4.9V 
B) -4.9V 
C) 19.1V 
D) -19.1V

Question 18

(a)
 
(b)
 
(c)

Figure \(16 1  in Figure  16-1(c)  if the diode is silicon?

Accepted Answer

A)   49.3 V 
B)   50 V 
C)   25 V 
D)   49.7 V 
A)   49.3 V 
B)   50 V 
C)   25 V 
D)   49.7 V

Question 19

Figure $18 < 1$
-If $\mathrm { R } _ { f } = 150 \mathrm { k } \Omega$  and $\mathrm { R } _ { \mathrm { i } } = 2.2 \mathrm { k } \Omega$ in Figure 18-1(c), the voltage gain equals________

Accepted Answer

A)   -1 
B)   -68.2 
C)   -69.2 
D)  infinite 
A)   -1 
B)   -68.2 
C)   -69.2 
D)  infinite

Question 20

$$\text { Figure } \mathbf { 1 7 } < \mathbf { 1 }$$
-$$\text { Find VBE in Figure } 17 - 1 .$$

Accepted Answer

A) 0.7V 
B) 5.71V 
C) 5V 
D) 15V 
A) 0.7V 
B) 5.71V 
C) 5V 
D) 15V

Which of these amplifiers provides a high input resistance and a variable gain?

To rectify is to convert dc to pulsating ac.

The general characteristics of a common-emitter amplifier are high voltage gain, high current gain and no phase reversal between the input and output voltages.

If an ohmmeter check of a diode indicates a high resistance in one direction and low resistance in the other, the diode is probably ________.

$\text { Figure } 17 < 1 -Which voltage might indicate that the amplifier in Figure 17-1 is cut off?$ $\text { Figure } 17 < 1$ -Which voltage might indicate that the amplifier in Figure 17-1 is cut off?

Amplifiers are electronic circuits that accept an AC input signal and produce an output signal that represents a:

$\text { Figure } 16<2 -If the filter capacitor becomes leaky in Figure 16-2, .$ $\text { Figure } 16<2$ -If the filter capacitor becomes leaky in Figure 16-2, .

Ripple voltage is caused by the charging and discharging of the diodes.

Which one of these amplifiers has high input resistance and low output resistance?

The purpose of a comparator is to ________.

In an inverting input op-amp integrator suppliedW ith a squareW ave pulse or a step, the output is a:

On transistor spec sheet, the key difference between $\beta \mathrm { DC }$ and $\alpha \mathrm { DC }$ is that:

If you measure 0.7 V across a diode, the diode is probably made of and is biased.

The voltage gain of several amplifiers in series is found by adding the individual stage voltage gains.

If an op-amp's output increases 8 V every 12 $\mu \mathrm { s }$ in response to a step input voltage, the slew rate equals_____

Figure $19 < 2$ -If the inputs are -7.1 V and 12 V in Figure 19-2(a),W hat is the output voltage?

(a) (b) (c) Figure $16 < 1$ -What is the voltage across R₁ in Figure 16-1(c) if the diode is silicon?

$\text { Figure } \mathbf { 1 7 } < \mathbf { 1 } - \text { Find VBE in Figure } 17 - 1 .$ $\text { Figure } \mathbf { 1 7 } < \mathbf { 1 }$ - $\text { Find VBE in Figure } 17 - 1 .$

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Inductors

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

Exam 16: Regulators, Filters, and Op-Amps

Which of these amplifiers provides a high input resistance and a variable gain?

To rectify is to convert dc to pulsating ac.

The general characteristics of a common-emitter amplifier are high voltage gain, high current gain and no phase reversal between the input and output voltages.

If an ohmmeter check of a diode indicates a high resistance in one direction and low resistance in the other, the diode is probably ________.

Figure 17<1\text { Figure } 17 < 1 Figure 17<1 -Which voltage might indicate that the amplifier in Figure 17-1 is cut off?

Amplifiers are electronic circuits that accept an AC input signal and produce an output signal that represents a:

Figure 16<2\text { Figure } 16<2 Figure 16<2 -If the filter capacitor becomes leaky in Figure 16-2, ________.

Ripple voltage is caused by the charging and discharging of the diodes.

Which one of these amplifiers has high input resistance and low output resistance?

The purpose of a comparator is to ________.

In an inverting input op-amp integrator suppliedW ith a squareW ave pulse or a step, the output is a:

Figure 18<118 < 118<1 -If Rf=333kΩ\mathrm { R } _ { f } = 333 \mathrm { k } \OmegaRf​=333kΩ and Ri=22kΩ\mathrm { R } _ { \mathrm { i } } = 22 \mathrm { k } \OmegaRi​=22kΩ in Figure 18-1(b), the voltage gain equals___________

On transistor spec sheet, the key difference between βDC\beta \mathrm { DC }βDC and αDC\alpha \mathrm { DC }αDC is that:

If you measure 0.7 V across a diode, the diode is probably made of ________ and is ________ biased.

The voltage gain of several amplifiers in series is found by adding the individual stage voltage gains.

If an op-amp's output increases 8 V every 12 μs\mu \mathrm { s }μs in response to a step input voltage, the slew rate equals_____

Figure 19<219 < 219<2 -If the inputs are -7.1 V and 12 V in Figure 19-2(a),W hat is the output voltage?

(a) (b) (c) Figure 16<116 < 116<1 -What is the voltage across R1 in Figure 16-1(c) if the diode is silicon?

Figure 18<118 < 118<1 -If Rf=150kΩ\mathrm { R } _ { f } = 150 \mathrm { k } \OmegaRf​=150kΩ and Ri=2.2kΩ\mathrm { R } _ { \mathrm { i } } = 2.2 \mathrm { k } \OmegaRi​=2.2kΩ in Figure 18-1(c), the voltage gain equals________

Figure 17<1\text { Figure } \mathbf { 1 7 } < \mathbf { 1 } Figure 17<1 - Find VBE in Figure 17−1.\text { Find VBE in Figure } 17 - 1 . Find VBE in Figure 17−1.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Inductors

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

$\text { Figure } 17 < 1 -Which voltage might indicate that the amplifier in Figure 17-1 is cut off?$ $\text { Figure } 17 < 1$ -Which voltage might indicate that the amplifier in Figure 17-1 is cut off?

$\text { Figure } 16<2 -If the filter capacitor becomes leaky in Figure 16-2, .$ $\text { Figure } 16<2$ -If the filter capacitor becomes leaky in Figure 16-2, .

On transistor spec sheet, the key difference between $\beta \mathrm { DC }$ and $\alpha \mathrm { DC }$ is that:

If you measure 0.7 V across a diode, the diode is probably made of and is biased.

If an op-amp's output increases 8 V every 12 $\mu \mathrm { s }$ in response to a step input voltage, the slew rate equals_____

Figure $19 < 2$ -If the inputs are -7.1 V and 12 V in Figure 19-2(a),W hat is the output voltage?

(a) (b) (c) Figure $16 < 1$ -What is the voltage across R₁ in Figure 16-1(c) if the diode is silicon?

$\text { Figure } \mathbf { 1 7 } < \mathbf { 1 } - \text { Find VBE in Figure } 17 - 1 .$ $\text { Figure } \mathbf { 1 7 } < \mathbf { 1 }$ - $\text { Find VBE in Figure } 17 - 1 .$