Explore topic-wise MCQs in Electronic Devices and Circuits Questions and Answers.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices and Circuits Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

Consider the figure given below. If the resistance R1 is disconnected from the ground and connected to a third power source v3, then expression for the value of

A. v0 is
B. 2v1 + 4v2 − 3v3
C. 6v1 + 8v2 − 3v3
D. 6v1 + 4v2 − 9v3
E. 3v1 + 4v2 − 3v3
Answer» D. 6v1 + 4v2 − 9v3
Discussion
2.

It is required to connect a transducer having an open-circuit voltage of 1 V and a source resistance of 1 MΩ to a load of 1-kΩ resistance. Find the load voltage if the connection is done (a) directly and (b) through a unity-gain voltage follower.

A. 1 μV and 1 mV respectively
B. 1 mV and 1 V respectively
C. 0.1 μV and 0.1 mV respectively
D. 0.1 mV and 0.1 V respectively
Answer» C. 0.1 μV and 0.1 mV respectively
Discussion
3.

For designing a non-inverting amplifier with a gain of 2 at the maximum output voltage of 10 V and the current in the voltage divider is to be 10 μA the resistance required are R1 and R2 where R2 is used to provide negative feedback. Then

A. R1 = 0.5 MΩ and R2 = 0.5 MΩ
B. R1 = 0.5 kΩ and R2 = 0.5 kΩ
C. R1 = 5 MΩ and R2 = 5 MΩ
D. R1 = 5 kΩ and R2 = 5 kΩ
Answer» B. R1 = 0.5 kΩ and R2 = 0.5 kΩ
Discussion
4.

The finite voltage gain of a non-inverting operational amplifier is A and the resistance used is R1 and R2 in which R2 is the feedback resistance. Under what conditions it can one use the expression 1 + R2/R1 to determine the gain of the amplifier?

A. A ~ R2/R1
B. A >> R2/R1
C. A << R2/R1
D. None of the mentioned
Answer» C. A << R2/R1
Discussion
5.

While performing an experiment to determine the gain for an ideal operational amplifier having finite gain, a student mistakenly used the equation 1 + R2/R1 where R2 is the feedback resistance. What is the percentage error in his result? Given A is the finite voltage gain of the ideal amplifier used.

A. (R2/R1)/(A+ R2/R1) X 100%
B. (1+R2/R1)/(A+R2/R1) X 100%
C. (1+R2/R1)/(A+1+R2/R1) X 100%
D. (R2/R1)/(A+1+R2/R1) X 100%
Answer» D. (R2/R1)/(A+1+R2/R1) X 100%
Discussion
6.

The gain for an ideal non-inverting operational amplifier is (given R2 is the feedback resistance)

A. R2/R1 – 1
B. R2/R1
C. -R2/R1
D. R2/R1 + 1
Answer» E.
Discussion
7.

For an ideal non-inverting operational amplifier having finite gain (A), the ratio of output voltage (v0) to input voltage (vi) is (given R2 is the feedback resistance)

A. (1+R2/R1)/(1+((1+R2/R1)/A))
B. (R2/R1)/(((1+R2/R1)/A))
C. (1+R2/R1)/(((1+R2/R1)/A))
D. (R2/R1)/(1+((1+R2/R1)/A))
Answer» B. (R2/R1)/(((1+R2/R1)/A))
Discussion