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You Are On Multi Choice Question Bank SET 3261
163051. Which of the following is a single input flip-flop ?(A) R-S(B) Dcr
(A): R-S (B): D (C): JK (D): Clocked RS
163052. Time constant of RC circuit is the Time during which capacitor voltage rises to of its final steady value.
(A): 50 (B): 100 (C): 63 (D): 70.
163053. Which of the following is an insulator ?
(A): Ferrite (B): Germanium (C): Silicon (D): Zinc
163054. Antimony is atype doping material.
(A): Trivalent (B): Semiconductor (C): Acceptor (D): Pentavalent
163055. A dynamic microphone is a......type transducer.
(A): Acoustical (B): Optical (C): Thermal (D): Variable resistance
163056. The function of NOT gate is to_____________.
(A): Invert an input signal (B): Add two input signals (C): Multiply two input signals (D): Perform as a universalgate
163057. The channel width in PAL system is_______________.
(A): ~ 3.5 MHz (B): 4.433MHz (C): 38.9MHz (D): 7 MHz
163058. Camping circuits make use of adding a____________level into an ac signal.
(A): Zero (B): DC (C): AC (D): Negative
163059. Which of the following statements is not related to Ohm's law ?
(A): Current is directly proportional to Pd (B): Current is inversely proportional to resistance (C): Law is applicable to dc circuits (D): Law is independent of temperature
163060. Which of the following is not used for making LED ?
(A): Germanium (B): Gallium arsenide (C): Gallium phosphide (D): Gallium arsenide phosphide
163061. In SCR if the conduction angle is less, the output, is________.
(A): More (B): Less (C): Not affected (D): Infinity
163062. The ripple output frequency of bridge rectifier in 50 Hz supply is________Hz.
(A): 50 (B): 25‘ (C): 100 (D): 60
163063. At saturation point of transistor, VCE___________volt.
(A): Zero (B): Vcc (C): One (D): Infinite
163064. In a multistage amplifier, the overall voltage gain is equal to ________of the gains of individual stages.
(A): Sum (B): Half (C): Product (D): Gain of one stage
163065. AM wave has________________side bands.
(A): no (B): one (C): a number of (D): two
163066. IF in AM radio receivers is obtained by__________.
(A): Detection (B): Heterodyning (C): Rectification (D): Amplification
163067. Barkhausen criterion is important in____________.
(A): Oscillation (B): Rectification (C): Doping (D): Demodulation
163068. ____________oscillator is not a sinusoidal oscillator.
(A): RC phase shift (B): Wien bridge (C): Crystal (D): UJT relaxation
163069. The statement not related to a diac is____________.
(A): It is a two terminal device (B): It is an SCR without its gate terminal (C): It can be used to trigger a triac (D): It is a bidirectional switching device
163070. The image continuity in motion pictures is obtained by the property of_________.
(A): Doppler effect (B): Skin effect (C): Photoelectric effect (D): Persistenceof vision
163071. dB is used to measure____________.
(A): power level (B): power (C): voltage (D): magnetic flux
163072. Cross over distortion occurs in________type of amplifiers.
(A): Class A (B): Class B (C): Class C (D): Push-pull
163073. The leakage current in a transistor is__________dependent on.
(A): Temperature (B): Voltage (C): Majority charge carriers (D): Input signal
163074. BJT is___________.
(A): A type of FET (B): A typo of UJT (C): NPN or PNP transistor (D): Bidirectional Junction Transistor
163075. Atomic number of Silicon is____________.
(A): 10 (B): 32 (C): 14 (D): 16
163076. Yellow, Violet. Red indicates__________Ohms.
(A): 4.7 (B): 470 (C): 4.7 k (D): 47 k
163077. __________loss is not a transformer loss.
(A): Core (B): Copper (C): Hysterisis (D): Dielectric
163078. SCRhas____________layers.
(A): PNNP (B): PNPN (C): PPNN (D): NPPN
163079. A logic circuit that has a high output only when all its inputs are low is_______
(A): AND (B): NAND (C): NOR (D): OR
163080. 88-108 MHz band of frequencies is used for____________broadcasting.
(A): TV' (B): FM (C): AM (D): Defence
163081. In FM receivers, limiter is used_________
(A): For automatic gain control (B): To eliminate amplitudevariations (C): To maintain minimum S/N ratio (D): To detect the audio signal from carrier
163082. The frequency range used for RADAR is_____________.
(A): UHF (B): VHF (C): UHFand Microwave (D): Microwave
163083. Approximate distance of geostationary satellite lrom earth is _
(A): 15,625 kms (B): 30,000 kms (C): 36,000kms (D): 80,000 kms
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