Explore topic-wise MCQs in Linear Integrated Circuit.

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Linear Integrated Circuit knowledge and support exam preparation. Choose a topic below to get started.

1.

HOW_THE_AVERAGE_TEMPERATURE_COEFFICIENT_OF_OUTPUT_VOLTAGE_EXPRESSED_IN_FIXED_VOLTAGE_REGULATOR??$

A. miilivolts/<sup>o</sup>C
B. miilivolts<sup>o</sup>C
C. None of the mentioned
D. <sup>o</sup>C/ miilivolts
Answer» B. miilivolts<sup>o</sup>C
Discussion
2.

Which of the following is not a characteristic of adjustable voltage regulators?

A. Non-versatile
B. Better performance
C. Increased reliability
D. None of the mentioned
Answer» B. Better performance
Discussion
3.

Compute the input voltage of 7805c voltage regulator with a current source that will deliver a 0.725A current to 65Ω, 10w load. (Assume reference voltage =5v)$

A. V<sub>in</sub> = 84v
B. V<sub>in</sub> = 34v
C. V<sub>in</sub> = 54v
D. V<sub>in</sub> = 64v
Answer» D. V<sub>in</sub> = 64v
Discussion
4.

An IC 7840 regulator has an output current =180mA and internal resistor =10Ω. Find the collector current in the output using the transistor specification: ß=15 and VEB(ON) =1.5v?#

A. 270mA
B. 450mA
C. 100mA
D. 50mA
Answer» C. 100mA
Discussion
5.

The change in output voltage for the corresponding change in load current in a 7805 IC regulator is defined a?

A. All of the mentioned
B. Line regulation
C. Load regulation
D. Input regulation
Answer» D. Input regulation
Discussion
6.

Find the difference between output current having a load of 100Ω and 120Ω for 7805 IC regulator. Consider the following specification: Voltage across the load = 5v; Voltage across the internal resistor= 350mv.$

A. 8.4mA
B. 7mA
C. 9mA
D. 3.4mA
Answer» B. 7mA
Discussion
7.

State the reason for thermal shutdown of IC regulator?

A. Spikes in temperature
B. Decrease in temperature
C. Fluctuation in temperature
D. Increase in temperature
Answer» E.
Discussion
8.

Which type of regulator is considered more efficient?

A. All of the mentioned
B. Special regulator
C. Fixed output regulator
D. Switching regulator
Answer» E.
Discussion
9.

To get a maximum output current, IC regulation are provided with

A. Radiation source
B. Heat sink
C. Peak detector
D. None of the mentioned
Answer» C. Peak detector
Discussion
10.

What is the dropout voltage in a three terminal IC regulator?

A. |V<sub>in</sub>| ‚â• |V<sub>o</sub>|+2v
B. |V<sub>in</sub>| < |V<sub>o</sub>|-2v
C. |V <sub>in</sub>| = |V<sub>o</sub>|
D. |V<sub>in</sub>| ≤ |V<sub>o</sub>|
Answer» B. |V<sub>in</sub>| < |V<sub>o</sub>|-2v
Discussion
11.

Which is not considered as a linear voltage regulator?

A. Fixed output voltage regulator
B. Adjustable output voltage regulator
C. Switching regulator
D. Special regulator
Answer» D. Special regulator
Discussion