Explore topic-wise MCQs in Linear Integrated Circuit.

This section includes 5 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.

Compute the input voltage of 7805c voltage regulator with a current source that will deliver a 0.725A current to 65 , 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
2.

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
3.

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

A. 270mA
B. 450mA
C. 100mA
D. 50mA
Answer» C. 100mA
Discussion
4.

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

A. All of the mentioned
B. Line regulation
C. Load regulation
D. Input regulation
Answer» D. Input regulation
Discussion
5.

Find the difference between output current having a load of 100 and 120 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