The Current in an Electron Beam in a Cathode-Ray Tube

Multiple Choice

The current in an electron beam in a cathode-ray tube is measured to be 280 µA.How many electrons hit the screen in 50 s? (e = 1.6 × 10−¹⁹ C)

A) 2.2 × 10¹¹ electrons
B) 8.8 × 10¹⁶ electrons
C) 8.8 × 10¹⁵ electrons
D) 2.2 × 10¹⁵ electrons