The Voltage Between the Cathode and the Screen of a Television

Multiple Choice

The voltage between the cathode and the screen of a television set is 22 kV.If we assume a speed of zero for an electron as it leaves the cathode,what is its speed just before it hits the screen?

A) 8.8 × 10⁷ m/s
B) 2.8 × 10⁶ m/s
C) 6.2 × 10⁷ m/s
D) 7.7 × 10¹⁵ m/s
E) 5.3 × 10⁷ m/s