Compute the no. Of electrons passing per minute through an electric bu

1.	Compute the no. Of electrons passing per minute through an electric bulb of 60w,220v
Answer» Given :-Power (P) = 60 WVoltage (V) = 220 VTime (T) = 1 min = 60 SecCharge of an electron (q) = 1.6 × 10⁻¹⁹ CTo Calculate :-Numbers of electron (n) = ???Formula to be used :-= I × T/Q ..... Eq (i)Solution :-Since in this equation/case we do not know the value of I, therefore our prime aim is to find the value of I using the formula,⇒ I = P/V⇒ I = 60/220⇒ I = 3/11 ASubstituting this value of I and the value of t and in eq (i), we get⇒ n = 3/11 × 60/1.6 × 10⁻¹⁹⇒ n = 180 × 10¹⁹/11 × 1.6⇒ n = 1.02 × 10²⁰ Electrons.Hence , the Numbers of electron (n) is 1.02 × 10²⁰ Electrons.

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