Question:medium

The input dc voltage of a 1-\(\phi\) full bridge inverter is 141.4 V and its duty ratio is 0.49. Then its approximate average and rms voltages are

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Look for perfect squares in the numbers provided! The duty ratio \(D = 0.49\) is a perfect square: \(\sqrt{0.49} = 0.7\). This tells you the RMS voltage must be exactly \(0.7 \times 141.4 \approx 99\text{ V}\). Finding the RMS value first lets you immediately pick option (3) without needing to compute the average value at all.

Updated On: Jun 25, 2026

\( \text{69.3 V and 202 V respectively} \)
\( \text{99 V and 202 V respectively} \)
\( \text{69.3 V and 99 V respectively} \)
\( \text{99 V and 69.3 V respectively} \)

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The Correct Option is C

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