An Electron in a Diode Before the advent of solid-state electronics, vacuum tube

Question

An Electron in a Diode Before the advent of solid-state electronics, vacuum tubes were widely used in radios and other devices. A simple type of vacuum tube known as a diode consists essentially of two electrodes within a highly evacuated enclosure. One electrode, the cathode, is maintained at a high temperature and emits electrons from its surface. potential difference of a few hundred volts is maintaine between the cathode and the other electrode, known as the anode, with the anode at the higher potential. (Figure 1) Figure 1 1 of 1

Explanation / Answer

(A) change in KE = q deltaV

m v^2 /2 = q deltaV

(9.109x 10^-31) v^2 /2 = (1.6 x 10^-19)(225)

v = 8.89 x 10^6 m/s

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