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OP–amp Nat Level – 2 - Physics MCQ

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10 Questions MCQ Test - OP–amp Nat Level – 2

OP–amp Nat Level – 2 for Physics 2024 is part of Physics preparation. The OP–amp Nat Level – 2 questions and answers have been prepared according to the Physics exam syllabus.The OP–amp Nat Level – 2 MCQs are made for Physics 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for OP–amp Nat Level – 2 below.

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*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 1

The output V_o of the ideal Op-Amp circuit shown is the figure is (in volts).

Detailed Solution for OP–amp Nat Level – 2 - Question 1

The correct answer is: -7

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 2

The circuit shown below represent a non-inverting integrator. For high frequency input (ω → ) impedance in ohms is?

Detailed Solution for OP–amp Nat Level – 2 - Question 2

Input impedance is given as
For (ω → ) input impedance → 0
The correct answer is: 0

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*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 3

The difference between the bandwidth of the amplifiers given below when both the Not answered Op-Amps have an open loop gain of 100dB and a unity-gain bandwidth of 3MHz (in KHz) is :

Detailed Solution for OP–amp Nat Level – 2 - Question 3

For non-inverting amplifier, closed loop gain is

For the inverting amplifier, the closed loop gain is.

Using the absolute value of A_cl the closed-loop bandwidth is

Therefore difference in their bandwidth is
= 63.8 - 44.3
= 19.5 kHz
The correct answer is: 19.5

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 4

In the given circuit using ideal Op-Amps, the output voltage (in mV) is :

Detailed Solution for OP–amp Nat Level – 2 - Question 4

Hence, V₁= 2x10⁶ x100x10³ = 200x10^-3V
Since, gain of second stage is -1
⇒ V_out = - 200mV
The correct answer is: -200

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 5

The output voltage for the scaling adder in figure shown below is (in volts)

Detailed Solution for OP–amp Nat Level – 2 - Question 5

The output voltage is

The correct answer is: -8.84

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 6

Figure shows a practical integrator with R_s = 30MΩ, R_F = 20MΩ and C_F = 0.1 μF. If a step (dc) voltage of +3V is applied as input for 0 < t < 4 (t is in seconds), the output voltage is a ramp function. What is the voltage in volts?

Detailed Solution for OP–amp Nat Level – 2 - Question 6

The correct answer is: -4

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 7

The certain inverting amplifier has a closed loop gain of 25. The Op-Amp has an open-loop gain of 100000. If another Op-Amp with an open loop gain of 200000 is substituted in the configuration, the closed loop gain is?

Detailed Solution for OP–amp Nat Level – 2 - Question 7

The closed loop gain depends on the configuration and open loop gain is completely independent of it. Hence even if open loop gain is changed, the closed loop gain remains at 25 with the same configuration.
The correct answer is: 25

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 8

If the voltage gain for each input of a summing amplifier with a 4.7 kΩ feedback resistor is unity, the input resistors must have a value of (in kΩ?

Detailed Solution for OP–amp Nat Level – 2 - Question 8

Voltage gain for each

The correct answer is: 4.7

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 9

An averaging amplifier has five inputs. Ratio must be?

Detailed Solution for OP–amp Nat Level – 2 - Question 9

Now to average 5 inputs, R_f should be

The correct answer is: 0.2

*Answer can only contain numeric values

OP–amp Nat Level – 2 - Question 10

The output voltage for the summing amplifier shown in figure is : (in volts)',

Detailed Solution for OP–amp Nat Level – 2 - Question 10

The correct answer is: -7

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