61. Which coupling produces the minimum interference with frequency response
a. RC coupling
b. Transformer coupling
c. Direct coupling
d. Impedance coupling
62. Complementary symmetry use two transistor that are
a. both NPN
b. both PNP
c. PNP and NPN
d. both FET
63. Which of the following circuits can operate class AB for audio power output?
a. Emitter follower
b. Push pull
c. Cascade
d. Darlington pair
64. A dc amplifier
a. dc only
b. ac only
c. both ac and dc
d. neither of the above
65. A bipolar transistor is a ………. controlled device whereas a FET is a ………… controlled device
a. Current-voltage
b. Current-current
c. Voltage – current
d. Voltage -voltage
66. Which of the following devices acts as an NPN and PNP transistor connected base to base and emitter to collector?
a. UJT
b. SCR
c. Diac
d. Triac
67. Which of the following is the fastest switching device/
a. JFET
b. BJT
c. MOSFET
d. Triode
68. Which of the following statement is false?
a. The zener diode is used as a constant voltage source
b. The SCR is a silicon rectifier with a gate electrode to control when current flows from cathode to anode
c. The gate electrode in the FET corresponds to the collector in a bipolar transistor
d. None of the above
69. Which of the following is the point of reference JFET
a. Drain
b. Gate
c. Source
d. None of the above
70. A junction field effect buy stanozolol injectable transistor can operate in
a. depletion mode only
b. enhancement mode only
c. depletion and enhancement modes
d. neither depletion nor enhancement modes
