HomeElectronic Devices and Circuits Electronic Devices and Circuits Online Quizzes - Section 6 bySubhash Chandra Guvvani •October 07, 2020 0 1. Which among the following represents the frequency at which short circuit CE current gain acquires unit magnitude? 1. f_{α} 2. f_{T} 3. f_{β} 4. None of the above 2. The cut-off frequency fβ is basically the frequency at which the short circuit __________ 1. CE gain of transistor drops by 3 dB from its value at low frequency 2. CC gain of transistor drops by 3 dB from its value at low frequency 3. CB gain of transistor drops by 3 dB from its value at low frequency 4. None of the above 3. Which among the below specified parameters exhibit inverse relationship with an input conductance of hybrid π model? 1. Current at constant hfe 2. Voltage at constant hre 3. Temperature at constant hfe 4. Resistivity at constant hre 4. The rate of -20 dB/decade is almost equivalent to __________ 1. -4 dB/octave 2. -10 dB/octave 3. -8 dB/octave 4. -6 dB/octave 5. Fidelity is nothing but an ability of amplifier to reproduce ________ 1. Phase shift signal 2. Amplitude shift signal 3. Input signal without any distortion 4. Output signal without any distortion 6. The value of dBm in power measurement is estimated by assuming the reference ,which is equal to ________ 1. 10mW 2. 1mW 3. 1/10 mW 4. 1/100 mW 7. The parameter 'h12' is basically a ratio of input voltage to the output voltage with the input current equal to _______ 1. Zero 2. Unity 3. Infinity 4. None of the above 8. What should be the level of input resistance to allow the occurrence of source loading in common base amplifier configuration? 1. Stable 2. Moderate 3. High 4. Low 9. Which type of amplifiers exhibit the current gain approximately equal to unity without any current amplification? 1. CE 2. CC 3. CB 4. None of the abovet 10. Generally, the resistance of thermistor decreases _______ 1. Linearly with the decrease in temperature 2. Exponentially with an increase in temperature 3. Exponentially with the decrease in temperature 4. Linearly with an increase in temperature Tags: Electronic Devices and Circuits Electronics & Communication Engineering Quizzes Facebook Twitter