Exam preparation MCQs with answers

Practice Pakistan's most useful MCQs for competitive exams

Prepare for NTS, PPSC, FPSC and subject-wise tests with fresh multiple choice questions, clear options and quick answer reveal.

Latest MCQs

A second condition for oscillations is____________?
  • (A)  A gain of 1 around the feedback loop
  • (B)  No gain around the feedback loop
  • (C)  The attention of the feedback circuit must be one-third
  • (D)  The feedback circuit must be capacitive
The piezoelectric effect in a crystal is___________?
  • (A)  A voltage developed because of mechanical stress
  • (B)  A change in resistance because of temperature
  • (C)  A change in frequency because of temperature
  • (D)  None of the above
A transistor has____________?
  • (A)  one pn junction
  • (B)  two pn junctions
  • (C)  three pn junctions
  • (D)  four pn junctions