Full Converters MCQs

Practice Full Converters MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Power ElectronicsFull Converters

For a single-phase fully controlled bridge rectifier with continuous load current, the ideal average DC output voltage is?

A2Vm cos alpha/pi
BVm(1+cos alpha)/(2pi)
CVm cos alpha/(2pi)
D2Vm sin alpha/pi

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Correct Answer: A. 2Vm cos alpha/pi

Explanation: For continuous current and ideal devices, a single-phase full converter gives Vdc=(2Vm/pi)cos alpha.

Reference: Standard power electronics: full converters

Question 2

Power ElectronicsFull Converters

For an ideal single-phase fully controlled bridge with continuous current, alpha=90 degrees gives average output voltage of?

AMaximum positive value
BZero
CMaximum negative value
DVm

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Correct Answer: B. Zero

Explanation: Vdc=(2Vm/pi)cos90°=0.

Reference: Standard power electronics: full converters

Question 3

Power ElectronicsFull Converters

For a single-phase fully controlled bridge with continuous current, increasing alpha beyond 90 degrees makes the average DC-side voltage?

ANegative
BAlways positive
CExactly zero for all alpha
DIndependent of alpha

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Correct Answer: A. Negative

Explanation: Since cos alpha becomes negative for 90°<alpha<180°, the converter's average DC voltage becomes negative; with suitable DC-side conditions this corresponds to inversion/regeneration.

Reference: Standard power electronics: full converters