An electric lamp is marked 100W,220.It is used for 5 hours daily. Calculate it's resistance while glowing
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Power=voltage^2/resistance
P=V^2/R
R=V^2/P
R=220^2/100
R=48400/100
R=484ohm
P=V^2/R
R=V^2/P
R=220^2/100
R=48400/100
R=484ohm
S321:
great answer
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