The figure shows four directions for the velocity vector v of a positively charged particle moving through a uniform electric field E (directed out of the page and represented with an encircled dot) and a uniform magnetic field B. (a) Rank directions 1,2, and 3 according to the magnitude of the net force on the particle, greatest first. (b) Of all four B directions, which might result in a net force of zero?

The figure shows four directions for the velocity vector v of a positively charged particle moving through a uniform electric field E (directed out of the page and represented with an encircled dot) and a uniform magnetic field B. (a) Rank directions 1,2, and 3 according to the magnitude of the net force on the particle, greatest first. (b) Of all four B directions, which might result in a net force of zero?

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

Chapter22: Magnetic Forces And Magnetic Fields

Section: Chapter Questions

Problem 24P: A current loop with magnetic dipole moment is placed in a uniform magnetic field , with its moment...

See similar textbooks

Similar questions

Suppose a twodimensional force field is everywhere directed outward from the origin, and C is a circle centered at the origin.What is the angle between the field and the unit vectors tangent to C ?
in what direction will the roop rotate (x-axis or y-axis) and torque magnitude given that it is a square loop with a side length of 4 cm with a current of 1.3 mA initially at rest and lies fltly within the xy plane with center at origin with a uniform magetic field of (2i +3k)mT and the magnetic moment point of the loop is to the k direction
Consider a uniform magnetic field of magnitude 0.2 T which is directed along the direction of the positive x axis. A positron, which was accelerated by a potential difference of 1 kV, enters this region of the magnetic field with a velocity v which forms an angle of 85 with the x axis. For this case in which the path that the positron describes is helical, as shown in Figure 1, determine:a) The radius r of the helical path.b) The pitch p of the helical path.
In a region a non-uniform magnetic field exists such that Bx = 0, By = 0, and Bz = ax, where a is a constant. At some time t, a wire of length L is carrying a current I is located along the x-axis from origin to x = L. Find the magnetic force on the wire at this instant in time.
Calculate the magnetic field and vector magnetic potential on axis resulting form z-directed magnetic dipole located at z=z0
A proton finds itself doing inform circular motion of 1.2 cm rudius due to a uniform 4.5 tesla magnetic field perpendicular to the plane of the circle. a. at what uniform speed is the proton moving? b. what is the frequancy of its cyclotron motion, in hertz?
A current loop with magnetic dipole moment is placed in a uniform magnetic field , with its moment making angle θ with the field. With the arbitrary choice of U = 0 for θ = 90°, prove that the potential energy of the dipole-field system is .
Two points are given in polar coordinates by (r, θ) = (2.00 m,50.0°) and (r, θ) = (5.00 m, -50.0°), respectively. What is thedistance between them?
Compute the force on charge A
Compute the flux of the vector field F=2xi+2yj through the surface S, which is the part of the surface z=36−(x^2+y^2) above the disk of radius 6 centered at the origin, oriented upward. flux = _____
Consider an infinite hollow conducting cylinder of inner radius R and outer radius 3R, as shown. The non-uniform current density J is out of the page and varies with distance r fromthe center as J=J0rk (k is k hat) where J0 is a positive constant. Calculate the magnetic field at point P (r = 2R) from the centre,(magnitude and direction). Sketch the Amperian loop.
Consider a uniformly charged ring in the xy plane, centered at the origin. The ring has radius a and positive charge q distributed evenly along its circumference. A small metal ball of mass m and negative charge −q0 is released from rest at the point (0,0,d) and constrained to move along the z axis, with no damping. At 0<d≪a, the ball's subsequent trajectory is oscillating along the z axis between z=d and z=−d. The ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. What will be the angular frequency ω of these oscillations? Use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. Express your answer in terms of given charges, dimensions, and constants.