Electronic Devices and Circuits-7 December 2, 2020December 24, 2020wefru Physics Electronic Devices and Circuits-7 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 7 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q61) What would be the computational value of feedback voltage in a negative feedback amplifier with A = 100, β = 0.03 and input signal voltage = 30 mV? 0.03 V 0.06 V 0.09 V 0.15 V 2 / 10 Q62) Which among the following is an output provided by transresistance amplifier? Output current proportional to signal voltage Output voltage proportional to signal current Output voltage proportional to input voltage Output current proportional to signal current 3 / 10 Q63) Which among the following will possess a higher bandwidth, if two transistors are provided with unity gain frequency? Transistor with lower hfe Transistor with higher hfe Transistor with lower hre Transistor with higher hre 4 / 10 Q64) Which among the following represents the frequency at which short circuit CE current gain acquires unit magnitude? fα fβ fT None of the above 5 / 10 Q65) The cut-off frequency (fβ) is basically the frequency at which the short circuit CB gain of transistor drops by 3 dB from its value at low frequency CE gain of transistor drops by 3 dB from its value at low frequency CC gain of transistor drops by 3 dB from its value at low frequency None of the above 6 / 10 Q66) Which among the below specified parameters exhibit inverse relationship with an input conductance of hybrid π model? Temperature at constant hfe Current at constant hfe Voltage at constant hre Resistivity at constant hre 7 / 10 Q67) The rate of -20 dB/decade is almost equivalent to __________ -4 dB/octave -6 dB/octave -8 dB/octave -10 dB/octave 8 / 10 Q68) Fidelity is nothing but an ability of amplifier to reproduce ________ Input signal without any distortion Output signal without any distortion Phase shift signal Amplitude shift signal 9 / 10 Q69) The value of dBm in power measurement is estimated by assuming the reference ,which is equal to ________ 1mW 10mW 1/10 mW 1/100 mW 10 / 10 Q70) The parameter 'h12' is basically a ratio of input voltage to the output voltage with the input current equal to _______ Unity Zero Infinity None of the above Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz