Answer :

6.0×10-4C

Given,


The electric current in the tube= 2.0 μA


Time for which charge transfer is to be calculated= 5 min=300s


Formula used


The amount of charge, q, transferred in t seconds, with a current I is



Solution,


The discharge tube carries a current of 2.0 μA. So the charge transferred across the cross-section in 300s, by the above relation, is



So the charge transferred across the cross-section is 6.0×10-4C


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