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 50 µA.How many electrons hit the screen in 7.0 s? (e = 1.6 × 10−¹⁹ C)

A) 4.4 × 10¹¹ electrons
B) 3.5 × 10¹³ electrons
C) 2.2 × 10¹⁵ electrons
D) 3.1 × 10¹⁸ electrons
E) 2.7 × 10¹⁷ electrons