A conducting bar rests to complete a circuit and immersed on a uniform magnetic field of B = 0.43 T. It is made of silver, has a length of 0.35 m, and diameter of 9 mm. The resistor on the circuit has 28 ohms resistance. Calculate the initial acceleration of the bar, when the resistor's resistance is decreased instantaneously to 4 ohms (due to short circuit). (Hint: you may need to calculate the maximum voltage first where the bar is in the state of equilibrium). R www B X X X XX Note: Final answer in ZERO decimal place. Use conventional current. Use pi = 3.14. Include the SI unit (s² should be written s^2). Use the following: resistivity of silver = 1.47x10-8 m density of silver = 10500 kg/m³

A conducting bar rests to complete a circuit and immersed on a uniform magnetic field of B = 0.43 T. It is made of silver, has a length of 0.35 m, and diameter of 9 mm. The resistor on the circuit has 28 ohms resistance. Calculate the initial acceleration of the bar, when the resistor's resistance is decreased instantaneously to 4 ohms (due to short circuit). (Hint: you may need to calculate the maximum voltage first where the bar is in the state of equilibrium). R www B X X X XX Note: Final answer in ZERO decimal place. Use conventional current. Use pi = 3.14. Include the SI unit (s² should be written s^2). Use the following: resistivity of silver = 1.47x10-8 m density of silver = 10500 kg/m³

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 28P: An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's...

See similar textbooks

Similar questions

An electron in a TV CRT moves with a speed of 6.0107 m/s, in a direction perpendicular to Earth's field, which has a strength of 5.0105 T. (a) What strength electric field must be applied perpendicular to the Earth’s field to make the election moves in a straight line? (b) If this is done between plates separated by 1.00 cm, what is the voltage applied? (Note that TVs are usually surrounded by a ferromagnetic material to shield against external magnetic fields and avoid the need for such a collection,)
This problem is in 3D. P is the center. Out of the page is a distance z from P. Let this z be 0.04 m. Calculate the "net" magnetic field at z provided that 1 = 358 A, a = 0.03 m, and b = 0.05 m. Use μ = 1.257x10-6 Wb/Am b NOTE: You will use here the right hand rule and superposition of magnetic field. Out of the page is +, while into the page is -. Final answer in FIVE decimal places. Ignore the effects of the straight wire at the bottom. Include the SI unit. Add your answer
A finite current-carrying wire lies on the y-axis as shown below. The current has a constant magnitude of I. The wire goes from y =d to y = c . Point P lies on the x-axis at æ = -b.
Question 1. Plot a Graph with the data in Table 2, use Magnetic Force as the vertical axis and Current as the horizontal axis. Perform a linear least squares fit on the Graph, record the slope, intercept, and correlation coefficient in the Table 3. [Refer to Appendix 3_ Graphical Analysis of Experiment Results.docx]. Assume the horizontal copper trace on the Magnetic Force Board perfectly perpendicular to magnetic field, determine the magnitude of the magnetic field B, show your calculation in Table 3. Current (A) Table 2 0 0.25 0.5 0.75 1 -0.5 -1 Table 3 Mass of Magnet Assembly (gram) (Measured from scale) 0.000 0.039 0.080 0.122 0.162 -0.094 -0.222 Graph: Measure magnetic force versus Current Slope: Intercept: Correlation coefficient: Calculate magnetic field strength from the slope of your graph: Magnetic Force FB (Newton) 0 0.3822 0.784 1.1956 1.5876 -0.9212 -2.1756
Magnetic flux is the measure of the magnetic field that passes through an area of space or an object. Its mathematical definition is: Y = | B ds z а Suppose you have a copper ring on the plane x,yas indicated in the figure above. Imagine that a constant mangetic field passes through it, given by the vector B = ŷ B, + î B̟. The magnetic flux must be: Ο to. Ψ-B, πα? O b. W = Byna?
The force experienced by a test charge q at a point in a region of electric and magnetic fields are given as follows: F1 = 0 for v = Voax F2 = 0 for v = Voay F3 = -[f3]qEoaz for v = vola, + 2a,) Where vọ and Eo are constants. What is the expression for B at that point. O Egaz O (Eo / volaz O Edlax - a,) O (Eo / vol(ax - a,)
A metal cube with sides of length a is moving at velocity v=voj across a uniform magnetic field B = Bok. The cube is oriented so that four of its edges are parallel to its direction of motion (i.e., the normal vector of two faces are parallel to the direction of motion). (Figure 1) Figure Bo N 1 of 1 Vo Part A Find E, the electric field inside the cube. Express the electric field in terms of vo, Bo, and unit vectors (i, j, and/or k). E = Submit Part B V ΑΣΦ -î Request Answer Now, instead of electrons, suppose that the free charges have positive charge q. Examples include "holes" in semiconductors and positive ions in liquids, each of which act as "conductors" for their free charges. www. J? If one replaces the conducting cube with one that has positive charge carriers, in what direction does the induced electric field point? Submit Request Answer
What is the magnetic field at point P shown below if a=3.39mm, b = 6.81mm, and the current 1=5,075A? Define positive as out of the page. Assume 3 significant digits and units of Tesla. b Pl —a—
A +6.50 μC point charge is moving at a constant 8.00 × 106 m/s in the +y-direction, relative to a reference frame. At the instant when the point charge is at the origin of this reference frame, find the magnetic- field vector B it produces at point x = 0, y = -0.500 m, z = +0.500 m. Enter your answers numerically separated by commas. Bx, By, B₂ = Submit ΨΓ ΑΣΦ xa Xb 010 √x x x Previous Answers Request Answer X Incorrect; Try Again; 6 attempts remaining २४ Review | Constants Ć = ? |X| X.10n T
Solve the following: A proton (of mass, m-1.67 x 1027kg) starts moving in a circular path of radius 5 cm when it enters perpendicular to the Earth's magnetic field of 1.75 x 10-5 T. Calculate Bin the speed X. of the cosmic ray proton in (m/s) ? X +q tu
Figure 1: CRT with coils in Helmholtz configuration. The hot cathode emits electrons which are then accelerated through potential difference Vacc. When the electrons enter the magnetic field B, which is perpendicular to their velocity, they move on a circular path with radius r. The magnetic field is due to coils in Helmholtz configuration (2 coils separated distance that equals their radius). The magnetic field due to one of the coils with radius R, at a point on the axis distance z away from the center of the coil, was found using the Biot-Savart law: HOIR?N B1 2(R2 + z2)ž
Let x=0 be the beginning of the magnetic field. Express the area (A), and express vw in terms of the area. Then what is vBw in terms of magnetic flux? The magnetic force on the conducting charges is an EMF, an electromotive force. Use these to derive the following expression for the EMF: dm E = dt There should be a minus sign, but let's not worry about that for now. B = 0.05 T (into the board) Frictionless Conducting RailsX X X × × X X¡ × _× × X X X X X X × X X X X X X X хххх хххx х,ххх X X Xx X, × X X v = 300 m/s X X X X хххх хх x|x хххх хххх X X Xx × X X X X XI X X X= X, + vt Frictionless Conducting Rails. MR=100 0 w = 2/3 m