Question 1

There may be occasions when it is necessary or desirable to have a higher DC voltage than is available.

Accepted Answer

Boost converters or step-up transformers can be used to increase DC voltage to a higher level when needed for specific applications.

Question 2

Direct current can be transformed.

Accepted Answer

Direct current (DC) cannot be transformed (in terms of voltage levels) using a transformer, which works on the principle of electromagnetic induction and requires alternating current (AC) to operate.

Question 3

Direct current must be converted into alternating current by the use of a(n) ____.&#10;A) inverter&#10;B) rectifier&#10;C) oscillator&#10;D) transformer

Accepted Answer

C

Question 4

When constructing a DC voltage doubler from a single-phase oscillator, the diodes create a _____.&#10;A) two-diode inverted rectifier&#10;B) two-diode controlled rectifier&#10;C) two-diode half-wave rectifier&#10;D) two-diode full-wave rectifier

Accepted Answer

A DC voltage doubler uses a two-diode full-wave rectifier configuration to convert AC to DC and double the voltage output.

Question 5

To increase the voltage of direct current, it must be converted, _____ and _____.&#10;A) increased, rectified&#10;B) adjusted, oscillated&#10;C) shifted, rectified&#10;D) tapped, rectified

Accepted Answer

To increase the voltage of direct current, it must first be converted to alternating current (AC), then the voltage can be increased using a transformer, and finally, it needs to be rectified back to direct current (DC) at the higher voltage. The options "increased" and "rectified" correctly describe this process.

Question 6

Alternating current can be rectified back to direct current.

Accepted Answer

Alternating current (AC) can be converted to direct current (DC) using a process called rectification, which is typically achieved with the use of diodes or rectifiers.

Question 7

A single-phase oscillator may be converted to a DC voltage doubler by introducing _____ and a capacitor filter.&#10;A) a triac&#10;B) two diodes&#10;C) a diac&#10;D) a transformer

Accepted Answer

A DC voltage doubler uses two diodes along with capacitors to double the voltage of a DC input. The diodes are crucial for directing the current flow during each half of the cycle in such a way that the output voltage is approximately twice the peak input voltage.

Question 8

The DC voltage doubler requires a(n) _____ to be connected before the load.&#10;A) capacitor filter&#10;B) rectifier&#10;C) oscillator&#10;D) resistor

Accepted Answer

A DC voltage doubler uses a capacitor filter to smooth out the pulsating DC before it reaches the load, ensuring a more stable DC output.

Deck 29: The Dc to Dc Voltage Doubler