Electronic Devices and Circuits-4 December 2, 2020December 24, 2020wefru Physics Electronic Devices and Circuits-4 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 4 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q31) What would happen, if the signal Xd passes through the feedback network? Xd will get multiplied by 'A' Xd will get multiplied by 'β' Xd will get multiplied by '1 – Aβ' Xd will get multiplied by '1 + Aβ' 2 / 10 Q32) Consider a single stage CE amplifier is estimated to possess the bandwidth of about 2MHz in addition to the resistive load of 500 ohm. What should be the value of source resistance in order to get the required bandwidth for the hybrid π equivalent circuit in accordance to the transistor assumptions given below? hfe = 100, gm = 30 mA , r'bb = 80Ω, Cc = 3pF, fT = 200MHz, Ce = 20pF, fH = 5MHz, r' be = 2kΩ 497.4 Ω 531.15 Ω 731.04 Ω 900 Ω 3 / 10 Q33) What should be the value of unity gain frequency for a short circuit CE transistor with gain of 30 at 4MHz and cut-off frequency of about 100 kHz? 40 MHz 80 MHz 120 MHz 150 MHz 4 / 10 Q34) Miller's theorem is applicable in a single stage CE hybrid π model in order to deal with ________ Series combination of CC and r'bc Series combination of Ce and r'be Parallel combination of CC and r'bc Parallel combination of Ce and r'be 5 / 10 Q35) Which capacitors assists in preventing the loss of gain due to negative feedback without affecting the DC stability of R-C Coupled amplifier? Coupling capacitors (Cc) Bypass capacitors (CE) Both a and b None of the above 6 / 10 Q36) Which among the following is not an advantage of RC coupled amplifiers? High fidelity No core distortion No impedance matching Wide frequency response 7 / 10 Q37) Which among the below mentioned circuits resemble its behaviour similar to that of an amplifier in high frequency region, as the response decreases with an increase in frequency? Simple high pass circuit Simple low pass circuit Simple band pass circuit Simple band stop circuit 8 / 10 Q38) Why is the Darlington configuration not suitable for more than two transistors? Because leakage current increases and voltage gain decreases with multiple number of transistors Because leakage current decreases and voltage gain increases with multiple number of transistors Because leakage current as well as voltage gain increases with multiple number of transistors Because leakage current as well as voltage gain decreases with multiple number of transistors 9 / 10 Q39) What should be the value of resistance between collector and ground (R0) for below drawn schematic of transistor amplifier, comprising h-parameters as hie = 1.1 kΩ, hfe = 50, hre= hoe = 0 with short-circuit capacitors? 5.2 k 2.3 k 1.1 k Infinity 10 / 10 Q40) Consider the assertions given below.A. Replacement of each coupling and bypass capacitors by a short circuitB. Replacement of transistor by its hybrid equivalent model for further analysisC. Replacement of DC voltage sources by a short circuitWhich is the correct sequential order of steps to be carried out for analysis of a transistor amplifier circuit? A, B, C B, A, C A, C, B C, A, B Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz