If the input frequency of half-wave rectifier is nHz ac, then its output is
A
a constant dc.
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B
0.5nHz pulsating dc.
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C
nHz pulsating dc.
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D
2nHz pulsating dc.
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Solution
The correct option is CnHz pulsating dc. A pulsating direct current may change in value, i.e., be always present but at different levels, or it may be interrupted completely. The changes may be irregular or at regular intervals (at a specific frequency), but the current never changes direction.