Explore topic-wise MCQs in Electrical Engineering.

This section includes 252 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

251.

Which of the following is true for the cut- off region in an npn transistor?

A. potential difference between the emitter and the base is smaller than 0.5v
B. potential difference between the emitter and the base is smaller than 0.4v
C. the collector current increases with the increase in the base current
D. the collector current is always zero and the base current is always non zero
Answer» C. the collector current increases with the increase in the base current
Discussion
252.

Which of the following condition is true for cut-off mode?

A. the collector current is zero
B. the collector current is proportional to the base current
C. the base current is non zero
D. all of the mentioned
Answer» B. the collector current is proportional to the base current
Discussion