Electronic Devices and Circuits-10 December 2, 2020December 24, 2020wefru Physics Electronic Devices and Circuits-10 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 10 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q91) Which among the below specified conditions is responsible to drive a low resistance load by the current amplifier circuit? Rs >> Ri R0 >> RL Rs << Ri R0 << RL 2 / 10 Q92) What should be the value of input resistance for an ideal voltage amplifier circuit? Zero Unity Infinity Unpredictable 3 / 10 Q93) Which among the following parameter/s increase/s due to positive feedback?A. Input voltageB. Output VoltageC. NoiseD. Voltage Gain A & B Only C B & D A, B, C & D 4 / 10 Q94) Which among the following plays a cardinal role in providing the transition capacitance in hybrid π model? Forward biased base-emitter junction Reverse-biased collector base junction Forward biased collector base junction Reverse-biased base-emitter junction 5 / 10 Q95) Which capacitance/s in hybrid π model represent/s the storage of excess minority carriers at the base emitter junction? Diffusion capacitance Transition capacitance Both a and b None of the above 6 / 10 Q97) Which resistance in hybrid π model of transistor represents the bulk resistance present between the external base terminal and the virtual base? Collector-to-emitter resistance (rce) Base spreading resistance (ŕbb) Virtual base to emitter resistance (ŕbe) None of the above 7 / 10 Q98) Why do the internal capacitances of transistor at low frequencies treated as open circuits by completely neglecting their effects in analysis? Due to high reactance Due to low reactance Due to moderate reactance None of the above 8 / 10 Q99) What does an arrow indicate in the below drawn schematic for frequency response curve of RC coupled amplifier? Ideal Frequency Response Practical Frequency Response Both a and b None of the above 9 / 10 Q99) What should be the gain of an amplifier at 20 kHz if the half power frequencies are fL = 20 Hz and fH = 15 kHz along with mid band gain = 80? 28.28 48.07 62.47 78.77 10 / 10 100) Which region/s in frequency response curve of an amplifier maintains the constant level of gain and output voltage? Low Frequency Region Low Frequency Region High Frequency Region All of the above Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz