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. A potential difference of a few hundred volts is maintained between the cathode and the other electrode, known as the anode, with the anode at the higher potential. Part A Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10?² cm , mounted coaxially within a cylindrical anode with a radius of 0.5580 cm . The potential difference between the anode and cathode is 345 V . An electron leaves the surface of the cathode with zero initial speed (v_initial = 0). Find its speed v_final when it strikes the anode. Express your answer numerically in meters per second. Hints v_final = m/s Submit My Answers Give Up

          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. A potential difference of a few hundred
volts is maintained between the cathode and the other electrode, known as the anode, with the
anode at the higher potential.
Part A
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10?² cm , mounted
coaxially within a cylindrical anode with a radius of 0.5580 cm . The potential difference
between the anode and cathode is 345 V . An electron leaves the surface of the cathode
with zero initial speed (v_initial = 0). Find its speed v_final when it strikes the anode.
Express your answer numerically in meters per second.
Hints
v_final =  m/s
Submit My Answers Give Up

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. A potential difference of a few hundred
volts is maintained between the cathode and the other electrode, known as the anode, with the
anode at the higher potential.
Part A
Suppose a diode consists of a cylindrical cathode with a radius of 6.200×10?² cm , mounted
coaxially within a cylindrical anode with a radius of 0.5580 cm . The potential difference
between the anode and cathode is 345 V . An electron leaves the surface of the cathode
with zero initial speed (vinitial = 0). Find its speed vfinal when it strikes the anode.
Express your answer numerically in meters per second.
Hints
vfinal = m/s
Submit My Answers Give Up

Added by Edward M.

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