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Question
An electron gun emits 2.0 ×1016 electrons per second. What electric current does this correspond to?
Sum
Solution
Rate of emission of electrons = 2 ×1016 per second
Total charge passing through the gun = 2 ×1016 ×1.6 × 10–19 = 3.2 × 10–3 per second
We know:-
Current, I = rate of flow of charge
∴ I = 3.2 × 10–3 A
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