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 * 10¹¹electrons B) 8.8 * 10¹⁶ electrons C) 8.8* 10¹⁵ electrons D) 2.2 * 10¹⁵ electrons

Question

Quizplus · Accepted Answer

The number of electrons can be calculated using the formula: Number of electrons = (Current × Time) / Charge of one electron. Substituting the given values: (280 × 10^-6 A × 50 s) / (1.6 × 10^-19 C) = 8.8 × 10^16 electrons.

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