NEET-XII-Physics
32: Electric Current in Conductors
- #3The 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?Ans : Let Q amount of charge be transferred across the cross-section of the tube.
Given:
Current through the discharge tube, I = 2 μA = 2 × 10-6 A
Time taken to transfer charge, t = 5 mins = 300 s
We know:
Q = It
∴ Q = 2 × 10-6 × 300 = 6× 10-4 C
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