Q.1

The difference between the upper and lower trigger points is called the Schmitt trigger.

  • True
  • False
Q.2

If an input signal is applied to the inverting input of an op-amp with the noninverting input grounded, the output signal would be opposite in polarity to the input.

  • True
  • False
Q.3

A series dissipative regulator is an example of a:

  • linear regulator
  • switching regulator
  • shunt regulator
  • dc-to-dc converter
Q.4

An op-amp has very low open-loop gain.

  • True
  • False
Q.5

If an input signal is applied to the inverting input of an op-amp with the noninverting input grounded, the output signal would be opposite in polarity with the input.

  • True
  • False
Q.6

An inverting amplifier has a phase shift of 180° from input to output.

  • True
  • False
Q.7

An astable multivibrator has two states.

  • True
  • False
Q.8

In a common-mode input to an op-amp, both inputs are connected to the same signal source.

  • True
  • False
Q.9

Changing the input voltage to an op-amp circuit will change its voltage gain.

  • True
  • False
Q.10

An oscillator whose frequency can be controlled by an input "control voltage" is called a(n) ______ .

  • PLL
  • Schmitt trigger
  • VCO
  • S-R latch
Q.11

An op-amp circuit in which the output voltage is equal to the difference between the two input voltages is called a(n) _____

  • integrator
  • differentiator
  • differential amplifier
  • voltage regulator
Q.12

A PLL can be used as a(n) ___________.

  • series voltage regulator
  • frequency multiplier
  • relaxation oscillator
  • Schmitt trigger
Q.13

Changing the input voltage to an op-amp circuit will change its voltage gain.

  • True
  • False
Q.14

An S-R flip-flop is an example of a bistable multivibrator circuit.

  • True
  • False
Q.15

The TO-5 operational amplifier package can have 5 pins.

  • True
  • False
Q.16

mcq18_1012.gif

Decreasing the gain in the given circuit could be achieved by

  • reducing the amplitude of the input voltage
  • increasing the value of the feedback resistor
  • increasing the value of the input resistor
  • removing the feedback resistor
Q.17

A virtual ground is a(n) ______ ground because this point is at zero volts.

  • ordinary
  • voltage
  • chassis
  • earth
Q.18

The voltage required to force the differential output to zero is called _______.

  • input-offset current
  • input-offset voltage
  • input bias current
  • slew rate voltage
Q.19

Common-mode signals have _____.

  • the same amplitude
  • the same phase
  • the same frequency
  • All of the above
Q.20

If the two inputs to a differential amplifier are exactly the same, then the output is the signal multiplied by two.

  • True
  • False
Q.21

Operational amplifiers (op-amps) use internal capacitive coupling between stages.

  • True
  • False
Q.22

The resistors Rf and Ri in an op-amp circuit control ______ .

  • positive feedback and current gain
  • negative feedback and power gain
  • negative feedback and voltage gain
  • open and closed loop gain
Q.23

In a common-mode input to an op-amp, both inputs are connected to the same signal source.

  • True
  • False
Q.24

If the input to a comparator is a sine wave, the output is a(n) _________.

  • ramp voltage
  • sine wave
  • sawtooth wave
  • rectangular wave
Q.25

A circuit that has an output equal to the algebraic sum of the inputs is called a(n) ______ .

  • integrator amplifier
  • summing amplifier
  • differential amplifier
  • voltage multiplier
Q.26

The ideal output impedance for an operational amplifier is 0 omega.gif.

  • True
  • False
Q.27

______ is NOT a characteristic of an ideal op-amp.

  • Infinite voltage gain
  • Minimum bandwidth
  • Infinite input impedance
  • Zero output impedance
Q.28

A series dissipative regulator is an example of a:

  • linear regulator
  • switching regulator
  • shunt regulator
  • dc-to-dc converter
Q.29

The common-mode rejection ratio (CMMR) is the ratio of _____ to ______.

  • the differential voltage gain, the common-mode voltage gain
  • the differential power gain, the common-mode power gain
  • the ideal voltage gain, the actual voltage gain
  • signal voltage, noise voltage
Q.30

The 555 timer can be connected to operate a(n) ___________.

  • astable multivibrator
  • bistable multivibrator
  • monostable multivibrator
  • astable multivibrator and a monostable multivibrator
0 h : 0 m : 1 s