what is the resistance of 40w, 220v Electric bulb
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power(P)=40W
Potential difference (V) =220V
P=V²/R
40=(220×220)/R
R=(220×220)/40
R=1210 ohm
Potential difference (V) =220V
P=V²/R
40=(220×220)/R
R=(220×220)/40
R=1210 ohm
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