Answer:
200 μC
Step-by-step explanation:
The charge collected by the sphere each second is equal to the current multiplied by the time. In this case, the current is 10 μA and the time is 20 s, so the charge collected by the sphere each second is 10 μA * 20 s = 200 μC.
I hope this helps! Let me know if you have any other questions or need further assistance.