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[" 47"47" (29) If voltage across a bulb ...

[" 47"47" (29) If voltage across a bulb rated "220V-100W" drops "],[C" n "C" by "2.5%" of its rated value,the percentage of the "],[V" ? Pated value by which the power would decrease is "],[5=(2)/(pi)times2%],[[" (1) "5%," (2) "10%],[" (2) "20%," (4) "2.5%]]

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