The current in a wire is 4.0 amperes. What is the time required for #2.5 times 10^19# electrons to pass a certain point in the wire?

1 Answer
Pankaj Solanki
Sep 27, 2017

1 second

Explanation:

Formula for Current
#I=q/t#
#I#= Current
#q#= total charge
#t#=time taken to pass electron from a certain point

Number of Electrons #=2.5xx10^19#
Total charge #q=n e=2.5xx10^19xx1.6xx10^-19=2.5xx1.6=4 C#

Current #I=1 "ampere" #

#I=q/t#
#t=q/I=(4C)/(4 A)=1 "second"#

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