Question: The current in an electron beam in a cathode-ray tube is measured to be 80 A. The number of electrons that hit the screen is

The current in an electron beam in a cathode-ray tube is measured to be 80 μA. The number of electrons that hit the screen is 8 s is:

a) 2 × 1015

b) 3 × 1015

c) 4× 1015

d) 6 × 1015

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