Explore topic-wise MCQs in Analog Circuits.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Analog Circuits knowledge and support exam preparation. Choose a topic below to get started.

1.

What will be the ratio of final current to initial current of a diode if voltage of a diode changes from 0.7V to 872.5mV. Take ideality factor as 1.5.

A. 90.26
B. 52.36
C. 80.23
D. 83.35
Answer» E.
Discussion
2.

If current of a diode changes from 1mA to 10mA what will be the change in voltage across the diode. The ideality factor of diode is 1.2.

A. 0.718V
B. 7.18V
C. 0.0718V
D. 0.00728V
Answer» D. 0.00728V
Discussion
3.

Consider a silicon diode with η=1.2. Find change in voltage if the current changes from 0.1mA to 10mA.$

A. 0.154V
B. 0.143V
C. 0.123V
D. 0.165V
Answer» C. 0.123V
Discussion
4.

Find the temperature at which a diode current is 2mA for a diode which has reverse saturation current of 10-9 A. The ideality factor is 1.4 and the applied voltage is 0.6V forward bias.

A. 69.65°C
B. 52.26°C
C. 25.23°C
D. 70.23°C
Answer» B. 52.26¬¨¬®‚Äö√†√ªC
Discussion
5.

Find the applied voltage on a forward biased diode if the current is 1mA and reverse saturation current is 10-10. Temperature is 25°C and take ideality factor as 1.5.$

A. 0.658V
B. 0.726V
C. 0.526V
D. 0.618V
Answer» E.
Discussion
6.

Calculate the reverse saturation current of a diode if the current at 0.2V forward bias is 0.1mA at a temperature of 25°C and the ideality factor is 1.5.$

A. 5.5x 10<sup>-9</sup> A
B. 5.5x 10<sup>-8</sup> A
C. 5.5x 10<sup>-7</sup> A
D. 5.6x 10<sup>-10</sup> A
Answer» D. 5.6x 10<sup>-10</sup> A
Discussion
7.

Calculate the thermal voltage when the temperature is 25°C.$

A. 0V
B. 0V
C. 0.026V
D. 0.25V
Answer» C. 0.026V
Discussion
8.

Calculate the forward bias current of a Si diode when forward bias voltage of 0.4V is applied, the reverse saturation current is 1.17√ó10-9A and the thermal voltage is 25.2mV.

A. 9.156mA
B. 8.23mA
C. 1.256mA
D. 5.689mA
Answer» B. 8.23mA
Discussion