Problem 2 A vacuum-tube diode consists of two concentric cylindrical electrodes of opposite charge. The electric...
oblem 2 A vacuum-tube diode consists of two concentric cylindrical electrodes of opposite charge. The electric potential between the electrodes is given by V(x)Cxa where x is in meters and C is a constant. Let the distance between the electrodes equal 13.0 mm and their potential difference equal 240 V. (a) Calculate the value for C. 7.85x10 V/m3 (b) Derive and expression for the electric field between the electrodes as a function of x. [Answer not given.) (c) Determine the...
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....
The electric potential V in the space between the plates of a given vacuum tube is given by V = (4.50×102) x2, where V is in volts if x, the distance from one of the plates, is in meters. Calculate the magnitude and direction (sign) of the electric field at 2.880 cm.
A capacitor is constructed of two concentric conducting cylindrical shells. The radius of the inner cylindrical shell is 2.37 x10-3 m, and that of the outer shell is 2.47 x 10-3 m. When the cylinders carry equal and opposite charges of magnitude 2.0 x 10-10 C, the electric field between the plates has an average magnitude of 3.8 x 104 V/m and is directed radially outward from the inner shell to the outer shell. Determine (a) the magnitude of the...
Two 13.0-cm-diameter electrodes 0.50 cm apart form a parallel-plate capacitor. The electrodes are attached by metal wires to the terminals of a 12 V battery. Part A) What is the charge on each electrode while the capacitor is attached to the battery? Part B) What is the electric field strength inside the capacitor while the capacitor is attached to the battery? Part C)What is the potential difference between the electrodes while the capacitor is attached to the battery? Part D)...
Two concentric charged spherical conducting shells of radii 3
and 4 cm carry equal and opposite charges of magnitude 8 * 10^-6 C
as shown in Figure 2.
a. find the electric field at r = 4cm
b. Find the electric potential at r=2 cm.
2. Two concentric charged spherical conducting she l1s of radii 3 and 5 cm carry equal and oppositecharges of taagnitude 8 x 10-6 c as shovn in Figure 2. a) Find the electric field at...
this question was answerd in wrong way
Problem 2: A vacuum tube contains two axial cylinders as shown in the figure below. The potential difference between these cylinders is 500V. Some electrons are released from the inner cylinder and are accelerated by the electric field toward the outer cylinder; a small current thereby travels through the tube. Suppose that a uniform magnetic field is set up parallel to the axis of the tube. This curves the trajectories of the electrons,...
Problem 28.57 Two 15-cm-diameter electrodes 0.44 cm apart form a parallel-plate capacitor. The electrodes are attached by metal wires to the terminals of a 20 V battery. After a long time, the capacitor is disconnected from the battery but is not discharged. Part A What are the charge on each electrode, the electric field strength inside the capacitor, and the potential difference between the electrodes right after the battery is disconnected? Express your answer to two significant figures and include...
Concentric Cylindrical Conducting Shells
1
An infiinitely long solid conducting cylindrical shell of radius
a = 4.8 cm and negligible thickness is positioned with its symmetry
axis along the z-axis as shown. The shell is charged, having a
linear charge density ?inner = -0.35 ?C/m. Concentric
with the shell is another cylindrical conducting shell of inner
radius b = 17.1 cm, and outer radius c = 21.1 cm. This conducting
shell has a linear charge density ? outer =
0.35?C/m....
The electric potential V in the space between two flat parallel plates 1 and 2 is given (in volts) by V = 2200x2, where x (in meters) is the perpendicular distance from plate 1. At x = 1.7 cm, (a) what is the magnitude of the electric field and (b) is the field directed toward or away from plate 1?