Tag: properties of an ideal op-amp

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Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

The slew rate of an opamp is found to be 10 V/microsecond. A voltage change of 100V will produce a time delay of

  1. 10 micro seconds

  2. 1 micro second

  3. 5 micro seconds

  4. 1 sec
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Slew rate describes the time delay the opamp offers to changes in input voltage. Thus a change of 100V will take 10 micro second in the output to describe.

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

In which of the following are operational amplifiers (op-amps) used?

  1. Oscillators

  2. Filters

  3. Instrumentation circuits

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

1.The oscillator circuits consists of a negative gain op-amp and a three section $RC$ network that produced the $180^{o}$phase shift.The phase shift network is connected from op-amp output back to its inverting input.

2. Op-amp  can be used in active filters as a active components.
3. Instrumentation amplifiers is a type of differential amplifiers that has been outfitted with input buffers amplifiers.so, op-amp are used in instrumentational circuits.
Therefore,op-amp can be used as a oscillators,filters and instrumentation circuits.

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

The output signal of an op-amp is _____ out of phase with its input signal connected to the inverting input terminal.

  1. 0

  2. 90

  3. 180

  4. 270
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If the signal is through the inverting terminal, output will appear 180 degrees out of phase, while if the input is through the non-inverting terminal, output will be in phase with the input

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

Opamps are:

  1. made out of a single electronic component

  2. made out of a set of transistors, resistors and other components

  3. batteries used for amplifying signals

  4. circuits that can oscillate the input signal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An operational amplifier (op-amp) is an integrated circuit consisting of many transistors, resistors, and capacitors designed to perform mathematical operations.

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

An input applied to either input terminal will result in _____.

  1. outputs from both output terminals, which have opposite polarities

  2. outputs from both output terminals, which have the same polarities

  3. a single output from one of the output terminals

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In a differential amplifier configuration, an input applied to one terminal results in outputs at both terminals that are equal in magnitude but opposite in phase (polarity).

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

The maximum frequency at which an op-amp may operate depends on the _____.

  1. bandwidth (BW)

  2. slew rate (SR)

  3. unity-gain bandwidth

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The maximum operating frequency of an op-amp is limited by its bandwidth, slew rate, and unity-gain bandwidth, as these parameters define how fast the output can change and the frequency range over which it can amplify.

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

An operational amplifier is a _____ gain and _____ bandwidth differential amplifier.

  1. very low, narrow

  2. low, wide

  3. medium, narrow

  4. very high, wide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An ideal operational amplifier is characterized by very high open-loop gain and a very wide bandwidth, allowing it to be used in various applications with feedback.

Multiple choice the operational amplifier (op-amp) electronics physics properties of an ideal op-amp

Pick out the correct option from the below for an opamp:

  1. output impedance= 75 ohms, input impedance = 1 M ohm and bandwidth = 5kHz

  2. output impedance= 75 ohms, input impedance = 1000 M ohm and bandwidth = 5kHz

  3. output impedance= 750 ohms, input impedance = 1 M ohm and bandwidth = 5kHz

  4. output impedance= 750 ohms, input impedance = 1 M ohm and bandwidth = 500 MHz
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A typical operational amplifier has very high input impedance (often in the range of Mega-ohms or Giga-ohms) and low output impedance (typically less than 100 ohms).