Part A Constants Suppose a diode consists of a cylindrical cathode with a radius

Question

Part A Constants Suppose a diode consists of a cylindrical cathode with a radius of 6.200 102 em, mounted coaxially within a cylindrical anode with a radius of 0 5580 cm The potential difference between the anode and 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 cathode is 340 V An electron leaves the surface of the cathode with zero initial speed (nitial Find its speed final when id strikes the anode Express your answer numerically in meters per second. Figure 1of 1 View Available Hint(s)

Explanation / Answer

given, cylindrical cathode, radius r = 6.2*10^-2 cm
radius of anode, R = 0.5580 cm
potential difference between cathode and anode, V = 340 V

so, dr = R - r = 0.496 cm
also, iniitoa velocity, u = 0 m/s
final velocity = v
now gain in KE = 0.5mv^2 = qV
q = 1.6*10^-19 C ( for an electron)
m = 9.1*10^-31 kg for an electron
0.5*9.1*10^-31*v^2 = 1.6*10^-19*340
v = 10934369.65 m/s = 10.93*10^6 m/s

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