55001. Common base configuration is little used because
55002. In figure it is desired that output wave is symmetrical. Then
55003. If the plate supply voltage for a plate modulated class C amplifier is E volts, the maximum plate-cathode voltage could be almost as high as
55004. If three cascaded stages of amplifier have gains 10, 20 and 30 the overall voltage will be
55005. A collector collects
55006. In a resistance loaded, RC coupled amplifier the d.c. component is blocked by
55007. A logarithmic amplifier has diode in the feedback path.
55008. The input resistance of FET in the low frequency small signal operation is
55009. The enhancement type MOSFET is called a
55010. The input gate current of a FET is
55011. For maximum unclipped output from a CE amplifier, the Q point should be
55012. The circuit shown in figure will act as
55013. Which of the following best represents the input impedance of an actual op-amp?
55014. An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. Which of the following will increases from this type of operation?
55015. For a transistor if a dc = 0.98 and emitter current IE is 2 mA, then base current will be
55016. Assertion (A): Linear ICs include audio amplifier, wideband amplifier, RF amplifier and IF amplifierReason (R): The error voltage in a feedback circuit is very small
55017. Mark ‘stands well’ with his boss. ‘Stands well’ closely means:?
55018. Assertion (A): The horizontal intercept of dc load line is the same as ideal cut off pointReason (R): When a transistor is in cut off region, collector current is zero
55019. I was happy--------------the appointment(Infinitive of’accept’)
55020. Which circuit is called swamped amplifier?
55021. As a person grows older small amount of enamel begin to wear away. This is called?
55022. In a linear op-amp circuit
55023. In a normally biased N-P-N transistor the main current crossing the collector junction is
55024. The changes in ambient temperature affect the open loop gain of amplifier.
55025. In a JFET, the lower end is called the __________ and the upper end is called the __________ .
55026. A semi-conductor device that behaves like two SCRs is
55027. As compared to a BJT amplifier circuit, a JFET amplifier circuit
55028. In an oscillator the total phase shift around the loop must be
55029. Which of the following parameters of CE circuit has the unit of ohms?
55030. Which award was declared for the poet A. Ayyappan before he passed away?
55031. Whenever a JFET operates above pinch-off voltage
55032. A Weinbridge oscillator is a
55033. RC network shown in the given figure can provide a maximum theoretical phase shift of
55034. Assertion (A): In the circuit shown figure the diode is used to protect the active devices. Transistor T goes into saturation when a positive pulse is applied at base and non conductingReason (R): When the current in an inductor is suddenly stopped, a high voltage is induced across it.
55035. When the ac input signal is very large the instantaneous operating point CE amplifier moves all the way between
55036. For full wave rectification four diode bridge rectifier is claimed to have following advantages: Less expensive transformerSmall size transformerSuitable for higher voltage applications Which of these are correct?
55037. Following figure is a signal conditioning Amplifier, changes gain depending upon the polarity of Vs. What will be circuit voltage gain for + Vs and for - Vs if D2 is ideal.
55038. Which class of amplifiers operates with least distortion?
55039. In a full wave diode rectifier circuit each diode carries current for
55040. When a JFET is cut off, it's like an __________ switch and when it is saturated, it's like a __________ switch.
55041. The mobility of e- for Ge and Si respectively is
55042. If a capacitor C is charged by a constant current I, then the rate of change of voltage with time given by sweep speed equal to
55043. In operational Amplifier, Common mode voltage gain should be
55044. Which op-amp circuit uses a resistance in series with input and capacitor in feedback path?
55045. Saturation of iron core causes distortion.
55046. Which of the following is non-sinusoidal oscillator?
55047. Low gain-bandwidth product of a JFET is due to
55048. The circuit of the figure is an example of feedback of the following type
55049. Oscillation frequency in Wein bridge oscillator is
55050. Assertion (A): A class C amplifier can also be used as frequency multiplierReason (R): When narrow current pulses drive a resonant circuit the output can be a near perfect sine wave