Solution:
When a current of is drawn by a filament of an electric bulb, the number of electrons passing through a cross-section of the filament in would be roughly .It is given that the current drawn by the filament is .
The formulas of charge are given by,
and
where , , , and are the charge, number of electrons, charge of electron, current and time respectively.
Therefore, from the formulas it can be said that
On substituting the given values, we get
electrons
Hence, the number of electrons passing through the cross-section of the filament in when of current is passing through the wire is electrons.
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