Electronic Devices and Circuits 1 December 2, 2020December 24, 2020wefru Engineering physics ,Electronic Devices and Circuits 0 Created on December 02, 2020 By wefru Electronic Devices and Circuits 1 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q1) This set of Electronic Devices and Circuits Mcqs focuses on “The AC Analysis of a Small-Signal Low-Frequency Common Emitter Transistor”.1. The feature of an approximate model of a transistor is it helps in quicker analysis it provides individual analysis for different configurations it helps in dc analysis ac analysis is not possible 2 / 10 Q.2 A transistor has hfe=100, hie=2kΩ, hoe=0.005mmhos, hre=0. Find the output impedance if the lad resistance is 5kΩ. 5kΩ 4kΩ 20kΩ 15kΩ 3 / 10 3. A CE amplifier when bypassed with a capacitor at the emitter resistance has increased input resistance and increased voltage gain increased input resistance and decreased voltage gain decreased input resistance and increased voltage gain decreased input resistance and decreased voltage gain 4 / 10 4. A transistor has hie =2kΩ, hoe=25µmhos and hfe=60 with an unbypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance? 90kΩ and 50kΩ respectively 33kΩ and 45kΩ respectively 6kΩ and 40kΩ respectively 63kΩ and 40kΩ respectively 5 / 10 5. A transistor has hie =1KΩ and hfe=60 with an bypassed emitter resistor Re=1kΩ. What will be the input resistance and output resistance? 90kΩ and 50kΩ respectively 33kΩ and 45kΩ respectively 6kΩ and 40kΩ respectively 63kΩ and 40kΩ respectively 6 / 10 6. In the given circuit, find the equivalent resistance between A and B nodes. 100kΩ 50kΩ 40kΩ 40kΩ 7 / 10 7. Which of the following acts as a buffer? CC amplifier CE amplifier CB amplifier cascaded amplifier 8 / 10 8. Which of the following is true? CC amplifier has a large current gain CE amplifier has a large current gain CB amplifier has low voltage gain CC amplifier has low current gain 9 / 10 In an NPN silicon transistor, α=0.995, IE=10mA and leakage current ICBO=0.5µA. Determine ICEO. 10µA 100µA 90µA 500µA 10 / 10 10. In CB configuration, the value of α=0.98A. A voltage drop of 4.9V is obtained across the resistor of 5KΩ when connected in collector circuit. Find the base current 0.01mA 0.07mA 0.02mA 0.05mA Your score isThe average score is 0% LinkedIn Facebook Twitter VKontakte 0% Restart quiz