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The inductor filter should be used when RL is consistently small because_________

(a) Effective filtering takes place when load current is high

(b) Effective filtering takes place when load current is low

(c) Current lags behind voltage

(d) Current leads voltage

This question was posed to me in an interview for job.

My question is taken from Inductor Filters topic in division Application of Diodes of Electronic Devices & Circuits

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The correct answer is (a) Effective filtering takes place when load current is high

Easy explanation: When RLis infinite, the ripple factor is 0.471. This value is close to that of a rectifier. So, the resistance should be small.

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