Question

3. When diodes that have unequal junction capacitances are connected in series in a circuit, they'll often be protected by A. parallel diodes. B. parallel capacitors. C. series resistors. D. parallel resistors.

5. The front-to-back resistance ratio of a power supply rectifier diode must be no less than A. 30 to 1. B. 2 to 1. C. 5 to 1. D. 10 to 1. 15. Which of the following is the correct equation for the percent regulation of a power supply? A. %VR = (VFL - VNL) VNL × 100 B. %VR = VNL VFL × 100 C. %VR = (VNL - VFL) VNL × 100 D. %VR = (VNL - VFL) VFL ×100

17. In a rectifier circuit, a surge-limiting resistor is mounted A. in parallel with the rectifier diode or diodes. B. in series with one or both electrolytic capacitors. C. in series with the rectifier diode. D. in parallel with the load resistor.

18. In a voltage divider circuit, the current through a bleeder resistor should be about A. ten times the current through the load resistor. B. ten percent higher than the current through the load resistor. C. ten percent of the current of the load resistor. D. equal to the current through the load resistor.

21. When diodes are connected in parallel in a circuit, in order to prevent current hogging, an equal _______ may be connected in _______ with each diode. A. resistor; parallel B. resistor; series C. capacitor; parallel D. capacitor; series

25. Which of the following has the highest value of percent ripple? A. A two-diode rectifier B. A bridge rectifier C. A three-phase, full-wave rectifier D. A half-wave rectifier

6.   In order to get full-wave rectification with a high current output without using a transformer, which of the following rectifier circuits would be used?

A. A bridge rectifier   B. A half-wave doubler   C. A two-diode rectifier   D. A full-wave doubler

Answer 1

-. Diocles. --wite un man ar. This is because the - Lfe,e.r 64,[email protected] t ㅰ녀 Parallel ha»-e plats conducting poperthes tahile betwee tenin oliodlus having vnequal jun tian cupautana, D. parallel resis boys are usedl.La of passe thhovgh these resistors wrent as tee resistare valua of these res ishoys divdler and hena prevents thediscles o danege 3 pm The normal Volt reifie is oTv whae in case of reversa is. upto į 1.5 v. Therefore the funt bics to back resistania ratio shoviol also lie within tee forco oud K reverse volt u4e vallies Do tee ontto -back esistanca ratio is в.atoi

9 am 3 Mways ,in ease of vole age regudation of ay any circit, -tte perPor menco is checked fom no-ead to ball Load which is tean dividad by its fie00-Load cap aat 15% that the cǐyait's ve leage capouty at is mavimem (full Load ) can be datarmined tee aswer is at its maximom voltage volta fL 1pm 4) The rectifier cirwit capauts and for the perpuse of high voltage Сараи toys are used2in series, The Surge. imetira resistors are used in series with may contcin one or moe Airs st hal ig unchorged,Ansuwar is cle when the capauturs are B. in series ith one or bo th aletv oy tic capaútbnS 6 pm

5) deter nine tees, ze of resisto γ |N Voltage "To The wrent in the divider reistor shold equal appmx. 15%nof the load coment "This current does not flow thmah a내of the Lcad ctevices an d it is caleed blea der cwmet nS c. ten pecent af cwrren t of Load resistor 5) Conent hogging is Sudclan fleo er high suxge 4 thuh the circitb Ans.. A. YesistoY parallel he dlioole, the varyinq corment passes t6 the rcsistur withoute olannage to teo ciodo olam og

has high vipple factor and lou eiecy Hay wou e rechter has γ,PPI. of 12y, and full wave reckifier haa vippla of 48 2z - wave recifer g) fuil wave tectifier can be ackieved using a) a fuel uave yeckifier o b) a bndge reckifier Be a fue wave retifier uses a trausfosme for volage setting Witket a trasfosme, fill wave retifation is achieve d bu . い hieved, by, Ri R3 (e The R value are replacece b