The electric curr

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