Discussion :: Automatic Control Systems
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When a unit step voltage drives a lag network the output
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A.
remains constant at unit step value
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B.
increases exponentially from zero to final value
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C.
decreases exponentially from 1 to 0
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D.
either (b) of (c) depending on values of R and C
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Answer : Option B
Explanation :
At t = 0 the capacitor behaves as a short-circuit and output voltage is 0. At t = ∞ capacitor behaves as an open-circuit and V0 = Vi.
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