Question 1

In the accompanying figure, since each half of the AC waveform must pass through one of the SCRs, only two are needed for full control of the bridge rectifier. &#10; &#8203; &#10; &#10;

Accepted Answer

True

Question 2

SCRs can control the output of a bridge rectifier when connected into a ____.&#10;A) gate circuit&#10;B) wave circuit&#10;C) limit circuit&#10;D) bridge circuit

Accepted Answer

SCRs, or Silicon Controlled Rectifiers, can control the output of a bridge rectifier when they are connected into the bridge circuit itself. This allows for the regulation of the output voltage by controlling the phase angle at which the SCR conducts.

Question 3

The phase-shift network can be the same as for a single SCR.

Accepted Answer

The phase-shift network used to trigger an SCR can also be used for triggering multiple SCRs in parallel or series configurations, as it primarily controls the timing of the gate signal relative to the AC supply voltage, which is a common requirement regardless of the number of SCRs being controlled.

Question 4

When only one SCR is used, the output voltage is ____.&#10;A) half-wave direct current&#10;B) full-wave direct current&#10;C) half-wave indirect current&#10;D) full-wave indirect current

Accepted Answer

When only one SCR (Silicon Controlled Rectifier) is used in a circuit, it allows current to pass through it in only one direction and only during one half of the AC cycle, resulting in half-wave rectification. This produces a half-wave direct current output.

Question 5

In the accompanying figure, two SCRs have been connected so that their cathodes are tied together to&#160; form the negative post of the bridge rectifier. &#10; &#160; &#10; &#10;

Accepted Answer

The answer of In the accompanying figure, two SCRs have...

Question 6

Almost all industrial applications for SCRs require full-wave rectification of the AC voltage.

Accepted Answer

Full-wave rectification is commonly used in industrial applications for SCRs (Silicon Controlled Rectifiers) to convert AC to DC, as it provides a more efficient and smoother DC output compared to half-wave rectification.

Deck 21: Scr Control of a Full Wave Rectifier