Question 1

-If   , the voltage gain equals ________.

Accepted Answer

A) -5 
B) -2 
C) -0.5 
D) 0 
A) -5 
B) -2 
C) -0.5 
D) 0 C

Question 2

-If   , the voltage gain equals ________.

Accepted Answer

A) 1.01 
B) 470 
C) 94 
D) 95 
A) 1.01 
B) 470 
C) 94 
D) 95 D

Question 3

The open-loop voltage gain of an op-amp is very large.

Accepted Answer

A) True 
 B)False  True

Question 4

To build an amplifier with a   input impedance and a voltage gain of 40, use the ________ amplifier,

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 5

-Identify the non-inverting amplifier in Figure 18-1.

Accepted Answer

A) Figure 18-1(a) 
B) Figure 18-1(b) 
C) Both A and B 
D) Neither of these 
A) Figure 18-1(a) 
B) Figure 18-1(b) 
C) Both A and B 
D) Neither of these

Question 6

A CMRR of 35,000 equals a decibel CMRR of ________.

Accepted Answer

A) 88 dB 
B) -91 dB 
C) 91 dB 
D) 35000 dB 
A) 88 dB 
B) -91 dB 
C) 91 dB 
D) 35000 dB

Question 7

If   = 25,000 in an inverting op-amp, A   equals ________.

Accepted Answer

A) -250 
B) -0.01 
C) 100 
D) -100 
A) -250 
B) -0.01 
C) 100 
D) -100

Question 8

If   and VOUT = 5 V in a noninverting op-amp,   equals ________.

Accepted Answer

A) 50 mV 
B) 500 mV 
C) 495 mV 
D) 49.5 mV 
A) 50 mV 
B) 500 mV 
C) 495 mV 
D) 49.5 mV

Question 9

If   and VOUT = 5 V in a noninverting op-amp,   equals ________.

Accepted Answer

A) 0.0099 
B) 99 
C) 101 
D) 1 
A) 0.0099 
B) 99 
C) 101 
D) 1

Question 10

If you know an op-ampʹs open-loop gain only, you can determine the closed-loop gain of:

Accepted Answer

A) a voltage follower op-amp. 
B) an non-inverting op-amp. 
C) an inverting op-amp. 
D) all of these. 
A) a voltage follower op-amp. 
B) an non-inverting op-amp. 
C) an inverting op-amp. 
D) all of these.

Question 11

The ideal amplifier has infinite gain, infinite input impedance, and zero output impedance.

Accepted Answer

A) True 
 B)False

Question 12

A typical op-amp has ________ input impedance and ________ output impedance.

Accepted Answer

A) low, low 
B) low, high 
C) high, low 
D) high, high 
A) low, low 
B) low, high 
C) high, low 
D) high, high

Question 13

An op-ampʹs input offset voltage, VOS, is the differential input voltage required to make the 9)
differential output voltage zero.

Accepted Answer

A) True 
 B)False

Question 14

Differential amplifiers provide high voltage gain and low common-mode rejection.

Accepted Answer

A) True 
 B)False

Question 15

A CMRR of 10,000 means that the op-amp provides that:

Accepted Answer

A) the common mode input is greatly reduced. 
B)    
C) the differential input is greatly amplified. 
D) all of these. 
A) the common mode input is greatly reduced. 
B)    
C) the differential input is greatly amplified. 
D) all of these.

Question 16

-The circuit in Figure 18-1(a) is used as a(n) ________.

Accepted Answer

A) inverting amplifier 
B) buffer amplifier 
C) oscillator 
D) high gain amplifier 
A) inverting amplifier 
B) buffer amplifier 
C) oscillator 
D) high gain amplifier

Question 17

-If   in Figure 18-1(c), Ri equals ________.

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 18

The distinguishing characteristic of the voltage follower configuration is:

Accepted Answer

A) very high input impedance. 
B) voltage gain of unity. 
C) non-inverting output. 
D) all of the above 
A) very high input impedance. 
B) voltage gain of unity. 
C) non-inverting output. 
D) all of the above

Question 19

-Which of the amplifiers in Figure 18-1 would be used as a buffer amplifier?

Accepted Answer

A) Figure 18-1(a) 
B) Figure 18-1(b) 
C) Figure 18-1(c) 
D) none of these 
A) Figure 18-1(a) 
B) Figure 18-1(b) 
C) Figure 18-1(c) 
D) none of these

Question 20

One characteristic of a noninverting amplifier is a ________.

Accepted Answer

A) voltage gain slightly more than an inverting amplifier with the same values 
B) very low input impedance 
C) voltage gain of one 
D) high output impedance 
A) voltage gain slightly more than an inverting amplifier with the same values 
B) very low input impedance 
C) voltage gain of one 
D) high output impedance

Exam 18: Passive Filters

-If , the voltage gain equals ________.

-If , the voltage gain equals ________.

The open-loop voltage gain of an op-amp is very large.

To build an amplifier with a input impedance and a voltage gain of 40, use the ________ amplifier,

-Identify the non-inverting amplifier in Figure 18-1.

A CMRR of 35,000 equals a decibel CMRR of ________.

If = 25,000 in an inverting op-amp, A equals ________.

If and VOUT = 5 V in a noninverting op-amp, equals ________.

If and VOUT = 5 V in a noninverting op-amp, equals ________.

If you know an op-ampʹs open-loop gain only, you can determine the closed-loop gain of:

The ideal amplifier has infinite gain, infinite input impedance, and zero output impedance.

A typical op-amp has ________ input impedance and ________ output impedance.

An op-ampʹs input offset voltage, VOS, is the differential input voltage required to make the 9) differential output voltage zero.

Differential amplifiers provide high voltage gain and low common-mode rejection.

A CMRR of 10,000 means that the op-amp provides that:

-The circuit in Figure 18-1(a) is used as a(n) ________.

-If in Figure 18-1(c), Ri equals ________.

The distinguishing characteristic of the voltage follower configuration is:

-Which of the amplifiers in Figure 18-1 would be used as a buffer amplifier?

One characteristic of a noninverting amplifier is a ________.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Branch, Loop, and Node Analyses

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Inductors

Transformers

RC Circuits

RL Circuits

RlC Circuits and Resonance

Circuit Theorems in Ac Analysis

Time Response of Reactive Circuits

Three-Phase Systems in Power Applications

Filters

A typical op-amp has input impedance and output impedance.