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You Are On Multi Choice Question Bank SET 1089

54451. A FET is a better clapper than a BJT because it has





54452. The input gate current of FET is closer to





54453. When a 1 V increase in gate voltage changes the drain current 10 mA in an FET, its gm equals





54454. In the circuit shown in the given figure, the current flowing through resistance of 100 Ω would be





54455. A sine wave is passed through an amplifier which severely limits it symmetrically. If then passes to a second amplifier which is narrow band and tuned to the frequency of the original sine wave. What will be the output wave from this second amplifier?





54456. In which configuration is ac collector voltage zero?





54457. Which connection is rarely used?





54458. Assertion (A): The main use of positive feedback is in oscillator circuits.Reason (R): In an oscillator the loop gain Aβ is kept slightly more than unity





54459. In a transistor which of the following region is very lightly doped and is very thin?





54460. The properties of FETs closely resemble those of a





54461. The purpose of providing groundings rings with MOSFET is to





54462. The minimum value of hfe of a transistor used in RC phase shift oscillator is





54463. Self bias is an example of __________ feedback that tends to stabilize the drain current against changes in temperature and JFET replacement.





54464. In voltage amplifiers, the load resistance





54465. The RC network of wein bridge oscillator consists of resistors and capacitors of values R = 220 kΩ and C = 250 PF Determine the frequency of oscillation





54466. Name the Egyptian President against whom people of Egypt revolted in 2011:





54467. In a single stage differential amplifier, the output offset voltage is basically dependent on the mismatch of





54468. In figure the dc load line will meet the y and x axis respectively at





54469. Transformer coupling is mostly used in





54470. Which of the following method cannot be used to increase the bandwidth for cascaded RF amplifier stages?





54471. The current ICBO flows in





54472. The h parameter h11 is the same in CE and CC circuit.



54473. A second-order band-pass active filter can be obtained by cascading a low pass second order section having cut off frequency fOH with a high pass second order section having cut-off frequency fOL provided





54474. Class A and Class B power amplifiers predominate at





54475. In a class C operation VCC = 30 V and VCE(sat) = 2 V. The efficiency is





54476. In a CE amplifier, the collector resistance is 6 kΩ and load resistance is 3 kΩ. The ac load resistance is





54477. A voltage tripler circuit uses





54478. An op-amp uses





54479. In a biased limiter the clipping level can be adjusted by adjusting the voltage of battery.



54480. One input terminal of high gain comparator circuit is connected to ground and a sinusoidal voltage is applied to the other input. The output of comparator will be





54481. 3N 200 is a





54482. The A.C. resistance of the emitter diode will be





54483. For a transistor amplifier with self biasing network, the following components are used. R1 = 4 kΩ, R2 = 4 kΩ, RC = 1 kΩ. The approximate value of the stability factor 'S' will be





54484. The gate electrode in the FET corresponds to the





54485. The properties of JFET resemble those of





54486. Assertion (A): Transformer coupling has the disadvantage of the weight of transformer and Saturation of coreReason (R): Transformer coupling is very suitable for impedance matching





54487. A Hartley oscillator is used for generation





54488. In a CE class A amplifier the quiescent current and voltage are ICQ and VCEQ. The maximum power output can be



54489. ‘Veto’ Power is given only to?





54490. In a P-N-P junction transistor as compared to base region is more heavily doped so that





54491. In every practical oscillator the loop gain is slightly more than unit and amplitude of oscillations is limited by





54492. Which of the following is not valid in case of FETs?





54493. When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common base short circuit current gain a for the transistor is





54494. Which of the following amplifier circuits has highest input impedance?





54495. Which of the following device acts as an N-P-N and a P-N-P transistor connected base to base and emitter to controller?





54496. A differentiating amplifier has capacitor in the input path.



54497. Which of the following statement about TRIAC is incorrect?





54498. A half wave diode rectifier and full wave diode bridge rectifier both have an input frequency of 50 Hz. The frequencies of outputs respectively are





54499. Tuned amplifiers are used at radio frequencies.



54500. The knee voltages in silicon and germanium diodes respectively are





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