Question:medium

If \(\alpha\) is ratio \(\frac{\text{T}_{\text{ON}}}{\text{T}}\) of chopper, then the ratio of input voltage to output voltage of step down and step-up chopper respectively are

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Always read the question carefully during exams! Most problems ask for the voltage gain ratio (\(\frac{V_0}{V_s}\)), which would be \(\alpha\) and \(\frac{1}{1-\alpha}\) (Option 4). However, this question explicitly asks for the inverse ratio (\(\frac{V_s}{V_0}\)), which turns the answers upside down into \(\frac{1}{\alpha}\) and \((1-\alpha)\). Don't lose points to a reading trap!

Updated On: Jun 25, 2026

\( \frac{1}{\alpha} \text{ and } (1-\alpha) \)
\( \frac{1}{\alpha} \text{ and } \frac{1}{(1-\alpha)} \)
\( \alpha \text{ and } (1-\alpha) \)
\( \alpha \text{ and } \frac{1}{(1-\alpha)} \)

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The Correct Option is A

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