Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Question
Chapter 2, Problem 2.9P
(a)
To determine
What is the velocity of an electron midway between the electrodes and at the instant of striking the plate, if the electrons are emitted from the cathode with zero velocity if a diode vacuum tube consists of a cathode and an anode spaced 5-mm apart, if 300 V are applied across the plates?
(b)
To determine
What is the average force exerted on the anode if the plate current is 20 mA?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A stream of electrons with a linear number density of 3.10 x 1011 electrons/meter are accelerated from rest
by a 62.0-V potential difference applied across two parallel plates. The electrons then pass through an
aperture in the high voltage plate and into a current collector where the beam current is measured.
Note: The mass of an electron is 9.11 x 10-31 kg.
(a) What is the magnitude of the electric field between the plates if they are 2.07 m apart?
V/m
(b) What is the final velocity of each electron?
m/s
(c) What is the beam current?
A
In an ion accelerator, 2.40x1013 helium-4 nuclei (charge +2e) per second strike a target. What is the magnitude of the beam current?
HA
k
at
nt
rences
Next >
Mc
Graw
Hill
< „Prev
3 of 10
acer
Įn a particular cathode ray tube, the measured beam current is 30 µA. How many electrons
Strike the tube screen every 10.0 s? Taken as qe = 1.602x10-19 C
O A) 2.87x10^15 electrons
O B) 1.13x10^15 electrons
O C) 1.87x10^5 electrons
O D) 7.5x10^15 electrons
O E) 2.41x10^15 electrons
Chapter 2 Solutions
Introduction To Health Physics
Ch. 2 - Two blocks of mass 0.1 kg and 0.2 kg approch each...Ch. 2 - A bullet whose mass is 50 g travels at a velocity...Ch. 2 - Compute the mass of the Earth, assuming it to be a...Ch. 2 - An automobile weighing 2000 kg and going at a...Ch. 2 - A small electrically charged sphere of mass 0.1 g...Ch. 2 - A capacitor has a capacitance of 10F . How much...Ch. 2 - A small charged particle whose mass is 0.01 g...Ch. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - A current of 25 mA flows through a 25-gauge wire,...Ch. 2 - An electron starts at rest on the negative plate...Ch. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - (a) A 1000-MW(e) nuclear power plant operates at a...Ch. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27PCh. 2 - The specific heat of water in the English system...Ch. 2 - Prob. 2.29PCh. 2 - Prob. 2.30PCh. 2 - Prob. 2.31PCh. 2 - Prob. 2.32PCh. 2 - How many cubic meters of water must fall over a...Ch. 2 - (a) Calculate the speed of a 25-MeV proton. (b)...Ch. 2 - Prob. 2.35PCh. 2 - Prob. 2.36PCh. 2 - Calculate the speed of a (a) 0.5-MeV electron and...Ch. 2 - How much sub-butuminous coal (20,000 kJ/kg) would...Ch. 2 - Prob. 2.40PCh. 2 - How much oil (138,690 Btu/gal) would it take to...Ch. 2 - How much oil (138,690 Btu/gal) would it take to...Ch. 2 - Prob. 2.43PCh. 2 - Prob. 2.44PCh. 2 - Prob. 2.45PCh. 2 - Prob. 2.46PCh. 2 - Prob. 2.47PCh. 2 - Prob. 2.48PCh. 2 - Prob. 2.49P
Knowledge Booster
Similar questions
- An alpha-particle (m=6.641027kg,q=3.21019C) moving with a velocity v=(2.0i4.0k)106m/s enters a region where E=(5.0i2.0j)104V/m and B=(1.0i+40.0k)102T . What is the initial force on it?arrow_forward(1) Find the mass of the air at 20°C in a living room with a 3.66 m × 5.45 m floor and a ceiling of 3.00 m high. (2)Determine the separation distance between two protons if the magnitude of the electric force between these two particles is 2.3×10-26 N. (3) A potential difference of 12 V is found to produce a current of 0.40 A in a 3.2 m length of wire with a uniform radius of 0.40 cm. Calculate the resistivity of the wire.arrow_forwardHow many electrons pass five point every second if a 0.400-amp current is flowing? (e= -1.602 x 10^-19 C)arrow_forward
- In the Bohr model of the hydrogen atom, the electron in the lowest energy state (ground state) moves with a speed of 2.2 X 106 m/s along a circular orbit of radius 5.3 X 10-11 m. What is the equivalent current (in A) associated with the orbiting of the electron?arrow_forward2*10^20 electrons flows through a cross section of an iron wire of diameter d=5.7mm in time t=13 s. What is the electron drift speed?arrow_forwardQ3: 42. Find and graph the charge q(t) and the current i(t) in the LC-circuit in Fig. 151, assuming L 1 H, C = 1 F, v(t) = 1 - e-t if 0 T, and zero initial current and charge. v(t) Fig. 151. LC-circuitarrow_forward
- In a particular television tube the beam current is 60.0µA. How long does it take for 3.00 x 1020 electrons to strike the screen?arrow_forwardAn electron travels with = 5.50 x 106 m/s through a point in space where E = (2.30 x 105 -2.30 x 1053) V/m and B = -0.100 k T.arrow_forwardThe discharging current in the atmosphere due to the small conductivity of air is known to be 1800 A on an average over the globe. Why then does the atmosphere not discharge itself completely in due course and become electrically neutral? In other words, what keeps the atmosphere charged?arrow_forward
- Which are true? a) Current is the total amount of charge that passes through a conductor's full cross section at any point per unit time. b) By convention, the direction of a current is taken to be the direction of flow for negative charges. c) When an electric field is applied to a conductor, the free electrons move only in the direction opposite the applied electric field. d) In order to maintain a steady flow of current in a conductor, a steady force must be maintained on the mobile charges. e) In a circuit, current is delivered by the positive terminal of a battery, and it is used up by the time it returns to the negative terminal of the battery.arrow_forwardAn aluminum strip 10 cm long, 2 cm wide and and 3 mm thick. A current flows in the longitudinal direction and a field of 0.75 T is perpendicular to the blade. If the potential between the two long sides of the blade is 3 micro-Volt, what is the current flowing through the blade? per atom in the material... m-electron = 9.11 x 10 ^-31 kg and m-proton = 1.76 x 10 ^-27 kg = m-neutron). We want to use the Hall Effect here.arrow_forwardThe Sl unit for electric current is dimensionally equivalent to: O [c] [s] O [c] [c] O [[c] [s]arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning