15 - chapter27-question9If the magnitude of the drift velocity of free electrons ( n = 8.5 x 1028 m-3) in a copper wire is 7.84 x10-4 m/s, what is the electric field (in V/m) in the conductor?qe = 1.6 x 10-19 C, pcu = 1.7 x 10-8n.mOption1 Option2 Option3 Option4 Option52.01.250.183.10.56

Answered: Image /qna-images/answer/11506930-943d-4faa-9dde-5fca996ec893.jpg

If the magnitude of the drift velocity of free electrons (n = 8.5 x 1028 m-3) in a copper wire is 7.84 x 10-* m/s, what is the electric field (in V /m) in the conductor?q, = 1.6 x 10-19 C, Pcu = 1.7 x 10-8n. m Option1 Option2 Option3 Option4 Option5 2.0 1.25 0.18 3.1 0.56

If the magnitude of the drift velocity of free electrons (n = 8.5 x 1028 m-3) in a copper wire is 7.84 x 10-* m/s, what is the electric field (in V /m) in the conductor?q, = 1.6 x 10-19 C, Pcu = 1.7 x 10-8n. m Option1 Option2 Option3 Option4 Option5 2.0 1.25 0.18 3.1 0.56

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 17P

See similar textbooks

Similar questions

A typical cell phone consumes an average of about 1.00 W of electrical power and operates on 3.80 V. (a) What average current does the phone draw from its battery? (b) Calculate the energy stored in a fully charged battery if the phone requires charging after 5.00 hours of use.
(a) Will the electric field strength between two parallel conducting plates exceed the breakdown strength for air ( 3.0 106 V/m) if the plates are separated by 2.00 mm and a potential difference of 5.0 103 V is applied? (b) How close together can the plates be with this applied voltage?
Two conductors made of die same material are connected across the same potential difference. Conductor A has twice the diameter and twice the length of conductor B. What is the ratio of the power delivered to A to the power delivered to B? (a) 8 (b)4 (c) 2 (d) 1 (e) 12
When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.
Two conducting wires A and B of the same length and radius are connected across the same potential difference. Conductor A has twice the resistivity of conductor B. What is the ratio of the power delivered to A to the power delivered to B? (a) 2 (b) 2 (c) 1 (d) 12 (e)12
A close analogy exists between the flow of energy by heat because of a temperature difference (see Section 19.6) and the flow of electric charge because of a potential difference. In a metal, energy dQ and electrical charge dq are both transported by free electrons. Consequently, a good electrical conductor is usually a good thermal conductor as well. Consider a thin conducting slab of thickness dx, area A, and electrical conductivity , with a potential difference dV between opposite faces. (a) Show that the current I = dq/dt is given by the equation on the left: ChargeconductionThermalconductiondqdt=A|dVdx|dQdt=kA|dTdx| In the analogous thermal conduction equation on the right (Eq. 19.17), the rate dQ/dt of energy flow by heat (in SI units of joules per second) is due to a temperature gradient dT/dx in a material of thermal conductivity k. (b) State analogous rules relating the direction of the electric current to the change in potential and relating the direction of energy flow to the change in temperature.
1. Silver is composed of 5.8 x 1028 free electrons per cubic meter. If a silver wire with a diameter of 1.8 mm can allow charges of 360 C to flow in 1 hour,a. What is the current in the conducting wire?b. What is the magnitude of the drift velocity of the electrons in the conducting wire?
008 A length of metal wire has a radius of 0.004 m and a resistance of 0.11 2. When the potential difference across the wire is 17 V, the electron drift speed is found to be 0.000353 m/s. Based on these data, calculate the density of free electron in the wire. The fundamental charge is 1.6 × 10 Answer in units of m ¬19 C.
1. Given a cylindrical conductor of radius 1.50 mm with current density 2.50A/m^2 and free-electron density of 8.00×10^ 28 m^−3 What is the drift speed? 2. A parallel plate capacitor is connected to an ideal battery with voltage V. While the battery is still connected, a slab with dielectric constant κ is inserted between the plates. Which of the following is TRUE regarding the electric field E and the stored energy U?
1. Consider a cylindrical wire that has conduction electron density 6.0 x 1028 and radius 0.5 mm. An electric field with strength 1 m3 7.5 x 10-4 creates a current of 4.8 × 10" electrons per second. a) What is the average drift speed for an electron? (include units) b) What is the average time in between electron collisions? fs (express your answer in femtoseconds)
全l。 A docs.google.com A metal object having a length (10m), cross section area (0.5 mm²), and resistance (0.5N) is connected to a potential difference source of 5V at room temperature. If the density of free electrons equals (8x1025 electron/m³), Calculate the drift velocity. 1.56m/s 1.13m/s 1.43m/s 1.62m/s 1.75m/s 0.56m/s 1.33m/s 2 points Calculate the capacitance for a p-n junction when a reverse bias with 3V is applied at T=350K. Assume that NA=1×1020/m³, Np=1×1018, n¡ = 1×1015/m³, &= 11.7, and the cross section area is lum. 1.521pF 1.212pF 1.512pF 1.203pF 1.432pF 1.182pF 1.441DF
2 | 3 I| I 4 III I 5 7. How much voltage is needed to produce a current of 6.0 A through a 24 V resistor? A. 4 V B. 18 V C. 30 V D. 144 V D because when you use the formula which is V-IR and you plug in the variables. V (6)(24) V = 144V and work is on paper. 8. A short copper rod has a neutral charge. Negative charges are then applied to the right end of the rod. Which of the following describes the charge on the copper rod 5 s later? A. Both ends of the rod have a positive charge. B. The negative charge is spread evenly along the rod. C. Only the right end of the rod has a negative charge. D. All of the positive charge is in the middle of the rod. 9. A simple circuit is made using a battery, a light bulb, and some wire. Based on Ohm's law, which of the following should always decrease the brightness of the light bulb? A. using less wire in the circuit C. adding a second bulb in parallel B. adding a second bulb in series D. using a battery with a greater voltage DELL