Basic Op-Amp Circuits

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Q. In a basic inverting op-amp circuit, if Rf is 10kΩ and Rin is 1kΩ, what is the gain?
  • A. -10
  • B. -1
  • C. 1
  • D. 10
Q. In a basic inverting op-amp configuration, what is the relationship between the input and output voltages?
  • A. Vout = Vin
  • B. Vout = -Vin
  • C. Vout = Vin/2
  • D. Vout = Vin + 1
Q. In a basic summing amplifier configuration, what does the output voltage depend on?
  • A. The sum of the input voltages
  • B. The product of the input voltages
  • C. The difference of the input voltages
  • D. The average of the input voltages
Q. In a differential amplifier configuration, what is the output voltage proportional to?
  • A. The difference between two input voltages
  • B. The sum of two input voltages
  • C. The average of two input voltages
  • D. The product of two input voltages
Q. In a non-inverting op-amp configuration, what is the relationship between the input and output voltages?
  • A. Vout = Vin
  • B. Vout = Vin + Vref
  • C. Vout = Vin * (1 + Rf/Rin)
  • D. Vout = Vin / (1 + Rf/Rin)
Q. In a non-inverting op-amp configuration, what is the relationship between the input and output voltage?
  • A. Vout = Vin
  • B. Vout = Vin + Vref
  • C. Vout = Vin * (1 + Rf/Rin)
  • D. Vout = Vin / (1 + Rf/Rin)
Q. In a summing amplifier using an op-amp, what is the output voltage if the inputs are 2V and 3V with equal resistors?
  • A. 5V
  • B. 2.5V
  • C. 1V
  • D. 0V
Q. In small-signal analysis, what is the purpose of the small-signal model?
  • A. To analyze large signal behavior
  • B. To simplify circuit analysis for small variations
  • C. To determine thermal characteristics
  • D. To calculate power dissipation
Q. What is the effect of increasing the feedback resistor (Rf) in a non-inverting op-amp configuration?
  • A. Increases the output voltage
  • B. Decreases the output voltage
  • C. Increases the gain
  • D. Decreases the gain
Q. What is the effect of increasing the value of feedback resistor Rf in a non-inverting op-amp?
  • A. Increases output voltage
  • B. Decreases output voltage
  • C. Increases input impedance
  • D. Decreases input impedance
Q. What is the output of an inverting op-amp if the input voltage is 1V and the feedback resistor is twice the input resistor?
  • A. 0.5V
  • B. 1V
  • C. 2V
  • D. -2V
Q. What is the output voltage of a non-inverting op-amp with a gain of 10 and an input voltage of 1V?
  • A. 1V
  • B. 5V
  • C. 10V
  • D. 0.1V
Q. What is the primary role of a diode in a rectifier circuit?
  • A. To amplify current
  • B. To allow current to flow in one direction
  • C. To store energy
  • D. To convert AC to DC
Q. What is the purpose of feedback in op-amp circuits?
  • A. To increase gain
  • B. To stabilize the output
  • C. To reduce power consumption
  • D. To isolate the input
Q. What is the typical input impedance of an ideal op-amp?
  • A. Zero ohms
  • B. Infinite ohms
  • C. 1000 ohms
  • D. 10,000 ohms
Q. What is the typical open-loop gain of an ideal op-amp?
  • A. 1
  • B. 10
  • C. 1000
  • D. Infinity
Q. Which component is commonly used to set the gain in a non-inverting op-amp configuration?
  • A. Resistor
  • B. Capacitor
  • C. Inductor
  • D. Diode
Q. Which of the following configurations provides a voltage follower using an op-amp?
  • A. Inverting configuration
  • B. Non-inverting configuration
  • C. Differential configuration
  • D. Integrator configuration
Q. Which of the following configurations provides the highest input impedance?
  • A. Inverting configuration
  • B. Non-inverting configuration
  • C. Voltage follower
  • D. Differential amplifier
Q. Which of the following is a common application of op-amps?
  • A. Voltage regulation
  • B. Signal modulation
  • C. Data storage
  • D. Power amplification
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