Question 1

Bridge type rectifiers require the use of two diodes instead of four.

Accepted Answer

Bridge rectifiers use four diodes arranged in a bridge configuration to efficiently convert AC (alternating current) to DC (direct current), allowing both halves of the AC waveform to be used.

Question 2

The bridge type rectifier requires the use of a center-tapped transformer.

Accepted Answer

A bridge rectifier does not require a center-tapped transformer; it uses four diodes arranged in a bridge configuration to rectify both halves of the input waveform.

Question 3

When the voltage turns on and off at regular intervals, but never changes polarity, the pulsations are&#160; generally referred to as ____.&#10;A) ripple&#10;B) drop&#10;C) drain&#10;D) static

Accepted Answer

Ripple refers to the regular fluctuations in voltage magnitude seen in a direct current (DC) supply that results from the process of converting alternating current (AC) to DC. This term is used because the voltage does not change polarity but rather fluctuates in magnitude at a constant polarity, resembling small waves or "ripples" on the surface of water.

Question 4

____ are devices that convert alternating or bidirectional current flow into direct or unidirectional&#160; current flow.&#10;A) Transformers&#10;B) Rectifiers&#10;C) Capacitors&#10;D) Inverters

Accepted Answer

Rectifiers are specifically designed to convert alternating current (AC) to direct current (DC), making choice B the correct answer.

Question 5

The amount of output DC voltage is referred to as the ____.&#10;A) nominal voltage&#10;B) average voltage&#10;C) maximum voltage&#10;D) median voltage

Accepted Answer

The amount of output DC voltage is often referred to as the average voltage because it represents the average value of the voltage over a period of time, which is a common way to describe the output of rectifiers or other DC power supplies.

Question 6

The simplest of all rectifiers is the ____.&#10;A) ripple half-wave&#10;B) multi-phase half-wave&#10;C) dual-phase half-wave&#10;D) single-phase half-wave

Accepted Answer

The simplest of all rectifiers is the single-phase half-wave rectifier. It consists of a single diode and a load resistor, allowing current to flow through the load only during one half of the AC supply cycle, thus converting AC to pulsating DC.

Question 7

The average DC voltage for a single-phase full-wave rectifier is ____ of the peak value.&#10;A) .12&#10;B) .524&#10;C) .637&#10;D) .9

Accepted Answer

The average DC voltage for a single-phase full-wave rectifier is 0.637 of the peak value. This is derived from the formula Vavg = (2*Vp)/π, where Vp is the peak voltage.

Question 8

Rectifiers can be divided into two basic types, single phase and three phase.

Accepted Answer

Rectifiers are electronic devices used to convert alternating current (AC) to direct current (DC) and can indeed be categorized into two basic types based on the input power they are designed to handle: single-phase rectifiers and three-phase rectifiers.

Question 9

There are two types of single-phase full-wave rectifiers: the two-diode type and the bridge type.

Accepted Answer

The two-diode type requires a center-tapped transformer and uses two diodes, each conducting for half a cycle, while the bridge type uses four diodes arranged in a bridge circuit, allowing for full-wave rectification without the need for a center-tapped transformer.

Question 10

The average DC voltage for the bridge rectifier can be computed in the same manner as the two-diode&#160; type full-wave rectifier.

Accepted Answer

Both the bridge rectifier and the two-diode full-wave rectifier convert AC to DC, and the average DC voltage for both can be computed using the formula Vdc = (2Vm/pi), where Vm is the peak voltage of the AC input. The difference in their configurations does not affect the basic formula for calculating average DC voltage.

Deck 6: Single Phase Rectifiers