65501. Which of the following metals is (are) used in the fabrication of Schottky diodes?
65502. What is the resistance of thermistors at boiling temperature (100ºC)?
65503. Which of the following areas is (are) applications of varactor diodes?
65504. This is an approximate equivalent circuit for the ________ diode.
65505. Which of the following materials is (are) used in the manufacturing of thermistors?
65506. What is the ratio IP / IV for gallium arsenide?
65507. What is the response time of light-emitting diodes (LEDs)?
65508. What type of temperature coefficient do thermistors have?
65509. Which of the following diodes has a negative-resistance region?
65510. The tuning diode is a ________-dependent, variable ________.
65511. What is the resistance of thermistors at room temperature (20ºC)?
65512. What is the response time of cadmium sulfide (CdS) in photoconductive cells?
65513. The PIV rating of power diodes can be increased by stacking the diodes in series.
65514. What are the typical ranges of reverse-bias current levels IS for low-power and high-power Schottky diodes at room temperature?
65515. The current capability of power diodes can be increased by placing two or more in series.
65516. In photodiodes, an increase in light intensity ________ the reverse current.
65517. The p-n junction of a tunnel diode is doped at a level from ________ to ________ times that of a typical semiconductor diode.
65518. In general, silicon ________.
65519. The response time for cadmium selenide (CdSe) is ________.
65520. Schottky diodes have ________.
65521. In both n-type and p-type silicon materials, the ________ is the majority carrier in a Schottky diode.
65522. A decrease in illumination ________ the resistance R of a photoconductive cell.
65523. In the reverse-bias region of varactor diodes, the resistance RR in parallel with the varying capacitor is ________ and the series resistance RS is ________.
65524. A Schottky diode has ________ level of current at the same applied bias compared to that of the p-n junction at both the forward- and reverse-bias regions.
65525. Schottky diode construction results in a ________ uniform junction region and a ________ level of ruggedness.
65526. The current capability of power diodes can be increased by placing two or more of the diodes in ________, and the PIV rating can be increased by stacking the diodes in ________.
65527. In the negative-resistance region of tunnel diodes, as the terminal voltage increases, the diode current ________.
65528. Typical levels of efficiency for solar cells range from ________ to ________.
65529. In varactor diodes, as the reverse-bias potential increases, the width of the depletion region ________, which in turn ________ the transition capacitance.
65530. Ge has a ________ dark current and a ________ level of reverse current than silicon.
65531. LCDs have ________ power requirement than (as) LEDs.
65532. The wavelength is usually measured in ________.
65533. The normal range of reverse-bias voltage VR for varactor diodes is limited to about ________.
65534. The barrier at the junction for a Schottky diode is ________ that of the p-n junction device in both the forward- and reverse-bias regions.
65535. The majority of power diodes are constructed using silicon because of its higher ________ rating(s).
65536. Varactor diodes are ________.
65537. LCDs are characteristically ________ LEDs.
65538. The PIV of Schottky diodes is usually ________ that of a comparable p-n junction unit.
65539. ________ is (are) the most widely used material(s) for solar cells.
65540. The negative-resistance region of tunnel diodes can be used in the design of ________.
65541. Which of the following areas is (are) an application of infrared-emitting diodes?
65542. Schottky diodes are very effective at frequencies approaching ________.
65543. What is the voltage drop across Schottky diodes?
65544. In which region is the operating point stable in tunnel diodes?
65545. What is the range of the varying capacitor CT in varactor diodes?
65546. In which period is the capacitor filter discharged through the load in a full-wave rectifier?
65547. The 7805 regulator IC provides ________.
65548. What is the range of the voltage level of the LM317 adjusted voltage regulator?
65549. A voltage regulator with a no-load output dc voltage of 12 V is connected to a load with a resistance of 10 . If the load resistance decreases to 7.5 , the load voltage will decrease to 10.9 V. The load current will be ________, and the percent load regulation is ________.
65550. Calculate the voltage regulation of a power supply having VNL = 50 V and VFL = 48 V.
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