3) In a vacuum diode electrons are emitted from a hot grounded cathode (V-0) and they...
A potential difference (p.d.) of 4800 V is applied between the cathode and anode of the tube. The cathode is heated and electrons are emitted from its surface. These electrons are then accelerated from rest and pass through a hole in the anode Cathode Anode Electrons 4800 V Show that the speed v of the electrons as they leave the anode is about 4 x 107 m s-1. V After leaving the anode, the electrons follow a parabolic path as...
A beam of electrons are emitted downwards from a cathode in an evacuated vacuum bulb and move in a circular path under the effect of the magnetic field created by the Helmholtz coil surrounding the vacuum tube as illustrated in the picture below. Use the right – hand rule to find out in which direction the magnetic field points and illustrate it in the picture. Helmholtz x Coil Electron beam path
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....
An investigation is performed using the apparatus shown below. Electrons are accelerated from rest from the cathode by an electric potential difference. The cathode and anode are 2.00% 102 cm apart. The electrons reach a speed of 2.10 x 10 m/s as they pass through the hole in the anode. Electron source and cathode Phosphorescent creen Anode Plate I-pdsitively chatged 19) → Electron -. p, plate ll-negatively charged Electric potential diffcrence Current-carrying coils that produce an rongnetic field Electrons then...
Suppose that in an electron gun, electrons are emitted from a hot filament at point f and are accelerated by an electric field to an opening at o, as shown. The charge on an electron is (-e) where e = 1.6 times 10^-19 C. (a) If the voltage (same as electric potential) at point f is - 280 Volts, what is the potential energy of an electron at f? (b) The electrons come off the filament with very low velocity,...
2. Electrons are emitted from an electron source with velocity, v, and enter a region of uniform magnetic field B that is perpendicular to the page. The electrons then leave the magnetic field at point P. Electron Source 4. On the figure above, sketch the path of the electrons from when they enter the region of uniform magnetic field B to point P. b. Indicate whether the magnetic field is directed into or out of the page. Explain your reasoning....
1.An aluminum cathode has a work function Φ=4.1eV. A stopping voltage Vs=1.7 V is applied between the anode and cathode. What is the maximum wavelength of the photon necessary to observe a current across the photoelectric tube? (8pts) [Answer in nm] 2.In an ion beam experiment, He+ ions are accelerated between two electrodes in a vacuum tube to generate a beam of high-energy ions. The ions reach kinetic energy Ek = 4·10-19 Joules and their mass is m=6.65·10-27 kg. What...
10-11. A linear magnetron has the following parameters Vo 32 kV lo 60 A Anode voltage: Anode current: f 10 GHz Operating frequency: Bo = 0.01 wb/m2 Magnetic flux density: Hub thickness: h-3 cm Distance between anode and cathode: d - 6 cm Compute: a. The electron velocity at the hub surface b. The phase velocity for synchronism c. The Hartree anode voltage l wish to help me in solving this question this the reference book is Microwave Devices and...
all of 8 please. 8. An aluminum wire carrying a current of 5 A has a cross sectional area of 4 x 10'6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom). a) Recall the mass flow rate equation from semester 1. Rms Ro v b) Write the equivalent current relation for charges in a wire, I- c) What is the electrical analogy...
Finding the charge to mass (e/m) ratio of the electron Often in physics, we look for ways to find fundamental physical constants. From the set-up demonstrated in class, we are able to find a monumental combination of two physical constants-the charge of an electron (e) and the mass of an electron (m). Since the charge of an electron (e) is well known through other experiments, we will use the ratio of charge to mass to find the mass of an...