Question: Which is not true for active and passive filter? a . A passive filter is used at audio frequency and an active at radio frequency

Which is not true for active and passive filter?
a.
A passive filter is used at audio frequency and an active at radio frequency
b.
A passive filter does not use op-amp while an active filter uses an op-amp
c.
A passive filter performs only filtering while an active filter amplifies too
d.
A passive filter cant use an inductor while an active filter can

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