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[" 3.An a.c.source is rated at "220V,50H...

[" 3.An a.c.source is rated at "220V,50Hz" .The time "],[" taken for voltage to change from its peak value to zero is "],[[" (a) "50sec," (b) "0.02sec],[" (c) "5sec," (d) "5times10^(-3)sec]]

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