Electronic Devices and Circuits 6 December 2, 2020December 24, 2020wefru Physics Electronic Devices and Circuits-6 Multiple Choice Question Answers for all competitive exams Preparation for NEEET / JEE and KEA Preparation. 0 Created on December 02, 2020 By wefru Electronic Devices and Circuits 6 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q51) Which among the below stated transistors operate in an active region for the purpose of amplification? BJT E-MOSFET Both a and b None of the above 2 / 10 Q52) Which type of breakdown effect gets enhanced due to parasitic BJT action along with increase in drain current solely by the reduction in size of MOSFET? Near-avalanche breakdown Snapback breakdown Both a and b None of the above 3 / 10 Q53) The breakdown voltage VCEV or VCEX in power transistor is the maximum voltage between collector and emitter with _________ Open circuited collector Open circuited base Base to emitter voltage that is adjusted to a specific negative value Base to emitter voltage that is adjusted to a specific positive value 4 / 10 Q54) What does an arrow indicate in the below drawn schematic of V-I characteristics of n-p-n power transistor? Primary breakdown Second breakdown Quasi saturation Active region 5 / 10 Q55) On which factor does the current gain (β) of power transistor depend? Thickness of emitter Thickness of base Thickness of collector All of the above 6 / 10 Q56) Which among the following components is /are not involved in the feedback network configuration of LC oscillators? Inductor Capacitor Resistor All of the above 7 / 10 Q57) Which is the necessary condition of gain while designing RC phase shift oscillator in order to ensure the sustained oscillations? A ≥ 29 A ≤ 29 A ≠ 29 None of the above 8 / 10 Q58) What is an angle of phase shift for each designed RC network in the Phase Shift Oscillator circuit? 30° 60° 90° 180° 9 / 10 Q59) Which among the below mentioned oscillators does not adopt any kind of feedback mechanism? Phase-shift oscillator Wein bridge oscillator UJT relaxation oscillator All of the above 10 / 10 Q60) After passing through which circuit/network ,does the signal Xd (output signal obtained by taking the difference of two input signals) get multiplied by '-1'? Amplifier circuit Feedback network Mixing network Sampling network Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz