ZacharySymonds ZacharySymonds

07-07-2014
Physics

Answered

how many electrons flow through filament of 120V -60W lamp in 1 second ?

Answer :

10-07-2014

[tex]P=U.i\\ \\ 60=120i\\ \\ i=0.5 \ A \\ \\ i=\frac{\Delta Q}{t}\\ \\ \Delta Q=i.t\\ \\ \Delta Q = 0.5 \ C\\ \\ Q=n.e\\ \\ n=\frac{Q}{e}\\ \\ n=\frac{0.5}{1.6*10^{-19}}=0.3125*10^{20}=3.125*10^{21} \ electrons[/tex]

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