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You Are On Multi Choice Question Bank SET 1050

52501. The mimicking of an open/closed switch by a diode allows alternating current to be:





52502. A reverse biased diode will act as an open switch.



52503. If the diode in a series circuit is reverse biased, the resistor will drop all the applied voltage.



52504. The PIV rating of a diode in a full-wave bridge rectifier is more than that required for a full-wave center-tapped configuration.



52505. The troubleshooting process for a typical dc power supply contains four steps.



52506. The number of electrons in a stable atom is the same as the number of protons in its nucleus.



52507. A rectifying diode can change ac voltage to dc voltage.



52508. The barrier potential is the small difference of potential created by positive and negative ions on either side of the depletion region.



52509. Dark current is a small reverse current that flows in a photodiode that is receiving no light.



52510. One of the advantages of using transformer coupling in a half-wave rectifier is that it allows the ac source to be directly connected to the load.



52511. A zener diode can be used to provide voltage regulation in a power supply.



52512. The positive lead of a diode is the cathode.



52513. It is not possible to use a half-wave rectifier circuit without a transformer.



52514. Electrons in the conduction band are the only ones that are included in the electron current flow.



52515. The forward biased characteristics of a zener diode are the same as those of a diode.



52516. Breakdown voltage and peak inverse voltage are the same.



52517. An LED can be tested with an ohmmeter.



52518. Reverse biasing a pn junction allows the flow of majority current.



52519. A zener diode can be tested with an ohmmeter.



52520. A diode can be tested with an ohmmeter.



52521. A zener diode has a larger breakdown voltage than a diode.



52522. The diode's characteristic curve shows that current increases when voltage increases.



52523. If a bridge rectifier is used, it is not necessary to use a transformer.



52524. Doping semiconductive material is the process of putting a small amount of pentavalent or trivalent atoms in with tetravalent atoms.



52525. A common problem with rectifiers is open diodes.



52526. A ___ is created when an electron moves from the valence band to the conduction band.





52527. The average value of the half-wave rectified output voltage is approximately __________ of Vp.





52528. Typically the forward voltage on an LED is between _______ and ________.





52529. A two-diode rectifier will not operate without a _________.





52530. The name of the circuit in the given circuit is the ___.





52531. The small amount of ac signal present on the output of a filtering network for a dc power supply is known as ________.





52532. The peak output voltage from the circuit in the given circuit equals ___.





52533. An electron can move to another atom's orbit only while in the _______.





52534. The average value of the output voltage from the circuit in the given circuit equals ___.





52535. Atoms in a silicon crystal are held together by ___ bonds.





52536. Special diodes designed to conduct in the reverse direction are called _______________ diodes.





52537. ___ occurs when a pn junction is first formed.





52538. Connecting a capacitor filter to the circuit in the given circuit will___.





52539. The peak inverse voltage (PIV) for the diode in the give circuit equals ___.





52540. A pure semiconductor material ___ very well.





52541. The nerve fibre is?





52542. What is a varistor?





52543. Which type of transformer is required to create a 180 degree input to a rectifier?





52544. What circuit activity may shift a characteristic curve so that diode operating points are different?





52545. What is wrong with this diode?





52546. The dc current through each diode in a bridge rectifier equals:





52547. When testing an n-channel D-MOSFET, resistance G to D = , resistance G to S = , resistance D to SS = and 500 , depending on the polarity of the ohmmeter, and resistance D to S = 500 . What is wrong?





52548. In the constant-current region, how will the IDS change in an n-channel JFET?





52549. A MOSFET has how many terminals?





52550. IDSS can be defined as:





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