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You Are On Multi Choice Question Bank SET 1191

59551. The output, V-I characteristics of an Enhancement type MOSFET has





59552. Piezoelectric quartz crystal resonators find application where





59553. The forbidden energy gap between the valence band and conduction band will be least in case of





59554. If too large current passes through the diode





59555. Figure shows the terminals of a transistor in plastic package TO 18. Then





59556. The network shown in the figure represents a





59557. In a bipolar transistor, the emitter base junction has





59558. Which of these has semi-conductor metal junction?





59559. The ripple factor of power supply is a measure of





59560. Assertion (A): When light falls at junction of p-n photodiode, its p side becomes positive and n side becomes negative. Reason (R): When a photodiode is short circuited, the current in the external circuit flows from p side to n side.





59561. In what condition does BJT act like an open switch





59562. Manometer is used to measure





59563. A power supply has full-load voltage of 20 V. What will be its no load voltage when its voltage regulation is 100%





59564. For a photo conductor with equal electron and hole mobilities and perfect ohmic contacts at the ends, an increase in the intensities of optical illumination results in





59565. Holes act like





59566. Assertion (A): Silicon is less sensitive to changes in temperature than germanium. Reason (R): It is more difficult to produce minority carriers in silicon than in germanium.





59567. The number of protons in a silicon atom is





59568. The emitter follower is widely used in electronic instrument because





59569. 1 atmospheric pressure is equivalent to





59570. An amplifier with resistive -ve feedback has two left poles in its open loop transfer function. The amplifier





59571. Amplification of ultrasonic waves is possible in a piezoelectric semiconductor under applied electric field. The basic phenomenon involved is known as





59572. For a junction FET in the pinch off region, as the drain voltage is increased, the drain current





59573. For a BJT, under the saturation region.





59574. In which mode of BJT operation are both junctions reverse biased?





59575. The greatest invention of man in palaeolithic age was?





59576. Ferrities are particularly suited for high frequency applications because of their





59577. In intrinsic semiconductor, the fermi level





59578. Electromagnetic waves transport





59579. In a forward biased p-n junction current enters p material as hole current and leaves n material as electron current of the same magnitude.



59580. When P-N junction is in forward bias, by increasing the battery voltage





59581. A semiconductor in its purest form called





59582. Which of the following is an active device?





59583. Assertion (A): The forward dynamic resistance of p-n diode varies inversely with current. Reason (R): The forward dynamic resistance of p-n diode varies with the operating voltage.





59584. If E (i.e., available energy state) = EF(i.e., Fermi level), then probability that state E will be occupied is 0.5 for any temperature T.



59585. Multi-national means:?





59586. In LED the radiation is in





59587. The rate of change of excess carrier density is proportional to carrier density.



59588. Half turn stair change their direction through





59589. The main reason why Ni-Zn ferrites are used for audio and T.V. transformers is that





59590. Assertion (A): Intrinsic semiconductor is an insulator at 0 K. Reason (R): Fermi level in intrinsic semiconductor is in the centre of forbidden energy band.





59591. Typical values of h parameters at about 1 mA collector current for small signal audio amplifier in CE configuration are :





59592. A CMOS amplifier when compared to an N-channel. MOSFET, has the advantage of





59593. Dynamic resistance of diode is



59594. The presence of some holes in an intrinsic semiconductor at room temperature is due to





59595. Voltage series feedback (Also called series-shunt feedback) results in





59596. How many free electrons does a p type semiconductor has?





59597. Which of the following has highest resistivity?





59598. Assertion (A): In p-n-p transistor collector current is termed negative. Reason (R): In p-n-p transistor holes are majority carriers.





59599. The sensitivity of human eyes is maximum at





59600. In a bipolar transistor, the base collector junction has





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