Answer:

first of all sry for wrong answer of last question u asked physics.

may be there is a mistake in ur question . it should be 5.4×10^15 round not 5.4× 10^-19.only then u will get write answer

now after correction

I=ef (I=current)

I=1.6×10^-19×5.4×10^15

I=8.64×10^-4

may be u will understand now

and check ur question carefully

Answer:

above is the correct answer of this question

hope it will help you