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Home⇒ Engineering⇒
Analog electronics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ A capacitor input filter relies on peak detection [other wrong options] [Discuss in forum] average detection both (a) and (b) neither (a) nor (b) |
Q2 ⇒ CMRR is the ratio of differential voltage gain to common mode gain. TRUE [other wrong options] [Discuss in forum] FALSE |
Q3 ⇒ Common emitter transistor has high current and high voltage gain [other wrong options] [Discuss in forum] low current gain and low voltage gain high current gain and low voltage gain low current and voltage gain |
Q4 ⇒ For an amplifier, the coupling method which gives the highest gain in transformer coupling [other wrong options] [Discuss in forum] impedance coupling capacitance coupling resistance coupling |
Q5 ⇒ In a current mirror the i - v curve of compensating diode is similar to transconductance curve of transistor [other wrong options] [Discuss in forum] the i - v curve of compensating diode is similar to collector curve of transistor either (a) or (b) neither (a) nor (b) |
Q6 ⇒ A transistor has
I and II only [other wrong options] [Discuss in forum] I only II only II and III only |
Q7 ⇒ Oscillator with best frequency stability is Crystal oscillator [other wrong options] [Discuss in forum] Phase shift oscillator Clapp oscillator Hartley oscillator |
Q8 ⇒ The noise figure of FET circuit is independent of the quiescent point [other wrong options] [Discuss in forum] dependent on the quiescent point only dependent on the triggering mechanism independent of all above |
Q9 ⇒ The emitter resistor RE in the emitter of CE amplifier stabilizes the dc operating point against variation in both temperature and β [other wrong options] [Discuss in forum] temperature only β of transistor none of the above |
Q10 ⇒ If input ac is 10 Vrms, then maximum voltage that will appear across the diode of a half wave rectifier with a capacitor I/P filter will be 14 V [other wrong options] [Discuss in forum] 10 V 20 V 28 V |
Q11 ⇒ The signal input to a given amplifier is made up of 100 mΩ signal power and 1 mΩ noise power. The amplifier contributes an additional 100 mΩ of noise and has a power gain of 20 dB. The input signal-to noise ratio is 100 [other wrong options] [Discuss in forum] 2 10 20 |
Q12 ⇒ The stray capacitance between the last stage and the first stage of an oscillator may cause unwanted high frequency oscillations [other wrong options] [Discuss in forum] unwanted low frequency oscillations unwanted oscillations at low and high frequencies large feedback |
Q13 ⇒ A D.C. amplifier amplify D.C. only [other wrong options] [Discuss in forum] A.C. only both A.C. and D.C. none of the above. |
Q14 ⇒ In switching devices, gold doping is used to reduce storage time [other wrong options] [Discuss in forum] improve bonding increase the mobility of the carrier protect the terminals against cooperation |
Q15 ⇒ Assertion (A): A self bias circuit is the most commonly used bias circuit for bipolar junction transistors Reason (R): A self bias circuit limits the increase in collector or emitter current due to change in junction temperature. Both A and R are correct and R is correct explanation for A [other wrong options] [Discuss in forum] Both A and R are correct but R is not correct explanation for A A is correct R is wrong A is wrong R is correct |
Q16 ⇒ For a good voltage amplifier, its input impedance should be high as compared to the resistance of the source [other wrong options] [Discuss in forum] low as compared to the resistance of the source always inductive always capacitive |
Q17 ⇒ A certain transistor has adc of 0.98 and a collectors leakage current of 5 μA. If IE = 1 mA, the base current will be 15 μA [other wrong options] [Discuss in forum] 35 μA 25 μA 5 μA |
Q18 ⇒ Assertion (A): The ac load line is different from dc load line Reason (R): The ac load resistance seen by collector and emitter is different from dc load resistance Both A and R are correct and R is correct explanation for A [other wrong options] [Discuss in forum] Both A and R are correct but R is not correct explanation for A A is correct R is wrong A is wrong R is correct |
Q19 ⇒ Most of the transistor data sheets specify the power rating for an ambient temperature of 25°C [other wrong options] [Discuss in forum] 10°C 50°C 75°C |
Q20 ⇒ Harmonic distortion in CB amplifier may be least when the load resistance is very high [other wrong options] [Discuss in forum] negligible very low infinite |
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