The electric current existing in a discharge tube is 2.0 μA. How much charge is transferred across a cross-section of the tube in 5 minutes?
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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