Q1.Transformer and emitter follower can both be used for impedance matching at the output of an audio amplifier. The basic relationship between the input power Pin and output power Pout in both the cases is
Answer : Option AExplaination / Solution: No Explaination.
Q2.The electron and hole concentrations in an intrinsic semiconductor are ni per cm3 at 300 K. Now, if acceptor impurities are introduced with a concentration
of NA per cm3
(where NA >> ni , the electron concentration per cm3 at 300 K
will be
Answer : Option DExplaination / Solution:
As per mass action law