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( 1 ) Which of the following semiconductor materials is (are) used in the manufacturing of tunnel diodes?
 1) Germanium
 2) Gallium
 3) Both germanium and gallium arsenide
 4) Silicon

Show Answer Report Discussion in forumAnswer : 3) Both germanium and gallium arsenide
Solution : Germanium and Gallium arsenide used in the manufacturing of tunnel diodes.
discussion
Answer : 3) Both germanium and gallium arsenide



( 2 ) Which of the following diodes has a negativeresistance region?
 1) Schottky
 2) Tunnel
 3) Varactor
 4) Power

Show Answer Report Discussion in forumAnswer : 2) Tunnel
Solution : Tunnel diodes has a negativeresistance region.
discussion
Answer : 2) Tunnel



( 3 ) Which among the following does not belong to the category of LC oscillators?
 1) Hartley oscillator
 2) Colpitt's oscillator
 3) Clapp oscillator
 4) Wein bridge oscillator

Show Answer Report Discussion in forumAnswer : 4) Wein bridge oscillator
Solution : Wein bridge oscillator does not belong to the category of LC oscillators.
discussion
Answer : 4) Wein bridge oscillator



( 4 ) Multivibrators belong to the category of _____________
 1) Square wave oscillators
 2) Triangular wave oscillators
 3) Ramp wave oscillators
 4) Sinusoidal oscillators

Show Answer Report Discussion in forumAnswer : 1) Square wave oscillators
Solution : Multivibrators belong to the category of Square wave oscillators.
discussion
Answer : 1) Square wave oscillators



( 5 ) What should be the value of input resistance for an ideal voltage amplifier circuit?
 1) Unpredictable
 2) Infinity
 3) Unity
 4) Zero

Show Answer Report Discussion in forumAnswer : 2) Infinity
Solution : Imagine now your voltage amplifier taking the part of the source in the first part and a load resistance connected to its o/p with its o/p impedance acting like Rs. Rs and the load now form a voltage divider The lesser the Rs, the better, full voltage is available to the load. So, the ideal case: Zin = infinity, Rs =0
discussion
Answer : 2) Infinity



( 6 ) Which among the following is an output provided by transresistance amplifier?
 1) Output current proportional to signal voltage
 2) Output voltage proportional to signal current
 3) Output voltage proportional to input voltage
 4) Output current proportional to signal current

Show Answer Report Discussion in forumAnswer : 4) Output current proportional to signal current
Solution : A transresistance amplifier outputs a voltage proportional to its input current. The transresistance amplifier is often referred to as a transimpedance amplifier, especially by semiconductor manufacturers
discussion
Answer : 4) Output current proportional to signal current



( 7 ) Stability of a transfer gain is generally defined as the reciprocal of _______
 1) Resistivity
 2) Conductivity
 3) Sensitivity
 4) Desensitivity

Show Answer Report Discussion in forumAnswer : 3) Sensitivity
Solution : Stability of a transfer gain is generally defined as the reciprocal of Sensitivity.
discussion
Answer : 3) Sensitivity



( 8 ) Miller's theorem is applicable in a single stage CE hybrid π model in order to deal with ________
 1) Series combination of C_{C} and r'_{bc}
 2) Series combination of C_{e} and r'_{be}
 3) Parallel combination of C_{C} and r'_{bc}
 4) Parallel combination of C_{e} and r'_{be}

Show Answer Report Discussion in forumAnswer : 3) Parallel combination of C_{C} and r'_{bc}
Solution : Miller's theorem is applicable in a single stage CE hybrid π model in order to deal with Parallel combination of C_{C} and r'_{bc}.
discussion
Answer : 3) Parallel combination of C_{C} and r'_{bc}



( 9 ) Fidelity is nothing but an ability of amplifier to reproduce ________
 1) Input signal without any distortion
 2) Output signal without any distortion
 3) Phase shift signal
 4) Amplitude shift signal

Show Answer Report Discussion in forumAnswer : 1) Input signal without any distortion
Solution : Fidelity is nothing but an ability of amplifier to reproduce input signal without any distortion.
discussion
Answer : 1) Input signal without any distortion



( 10 ) What should be the level of input resistance to allow the occurrence of source loading in common base amplifier configuration?
 1) Low
 2) High
 3) Moderate
 4) Stable

Show Answer Report Discussion in forumAnswer : 1) Low
Solution : As per the configuration of CB amplifier, it is obvious that its input resistance is very low whereas its output resistance is extremely high.
However, the lower value of input resistance allows the provision of source loading in common base amplifier circuit.
Thus, there is no current amplification due to unity current gain. These all reasons ultimately contribute to high level of voltage gain.
discussion
Answer : 1) Low
