A transistor has___________

• one pn junction

• Two pn junctions

• three pn junctions

• four pn junctions

The number of depletion layers in a transistor is …………

• four

• three

• one

• two

The base of a transistor is ………….. doped

• heavily

• moderately

• lightly

• none of the above

The element that has the biggest size in a transistor is ………………..

• collector

• base

• emitter

• collector-base-junction

The transistor was invented in

• 1948

• 1947

• 1974

• 1847

In a NPN transistor, the N-regions are_____________

• Base and Emitter

• Base and collector

• Emitter and collector

• Both A and B

The emitter current is always_____________________

• Greater than the base current & Greater than the collector current

  OR

  BOTH A AND C

• Less than the collector current

• Greater than the collector current

• Greater than the base current

In NPN Transitor current conduction is mainly due to the flow of

• Electrons

• Holes

• protons

• None of the above

In PNP Transitor current conduction is mainly due to the flow of

• Electrons

• Holes

• neutrons

• None of the above

The most of the majority carriers from the emitter ……………

• Recombine in the base

• Recombine in the emitte

• Pass through the base region to the collector

• None of the above