There are two square metal frames as shown in the figure. The outer (blue) frame is fixed (not moving) and carries a counter-clockwise electric current. If the inner (red) frame begins to rotate around its axis (the red line), what is the direction of the induced current in the inner frame, right after it starts rotating?

There are two square metal frames as shown in the figure. The outer (blue) frame is fixed (not moving) and carries a counter-clockwise electric current. If the inner (red) frame begins to rotate around its axis (the red line), what is the direction of the induced current in the inner frame, right after it starts rotating?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 21P: Two long wires, one of which has a semicircular tend of radius R, are positioned as shown in the...

See similar textbooks

Similar questions

A wire of length L carrying current I1, traveling towards the right is a distance d above the top of a square loop of wire of side length L2, where L2, < L1, carrying current I2 traveling counterclockwise. What is the force on the loop in terms of any of the given variables and any necessary physical constants? Is the force attractive or repulsive?
Two long wires, one of which has a semicircular bend of radius R and center P, are positioned as shown below. If both wires carry a current I, how far apart must their parallel sections be so that the total magnetic field at P is zero? Express a in terms of R. Does the current in the straight wire flow up or down? Explain. The infinite, straight wire shown below carries a current I1. The rectangular loop, whose long sides are parallel to the wire, carries a current I2. What are the magnitude and direction of the total magnetic force on the rectangular loop due to the magnetic field of the long wire?
A molecule with mass m = 255mp (where mp is the mass of a proton) and charge q = −e, moving with a velocity v = 2 × 105 m/s, enters a region of uniform magnetic field B = 0.8 T, as shown in the figure above. The particle strikes the wall at a distance d from the entrance slit. Determine d.
) In the figure below, the current in the long, straight wire is I1 = 6.00 A and the wire lies in the planeof the rectangular loop, which carries the current I2 = 10.0 A. The dimensions are c = 0.100 m, a =0.150 m, and l = 0.500 m. Find the magnitude and direction of the net force exerted on the loop by themagnetic field created by the wire.a) find the force on the left hand side of the loop firstb) find the force on the right hand side of the loop secondc) find the net force (be careful about the directions)
A conducting bar of length L=80 cm is rotated on a conducting circular platform as shown in the figure. 50 kΩ-resistor and 40 μF capacitor are attached on the platform and an outward uniform magnetic field of magnitude 12 mT is applied to the medium. If the bar rotates with a constant angular speed of w=5 rad/s, what is the instantaneous charge on the capacitor after 0.5 s from the beginning of the motion if it is uncharged initially?
A single loop (N=l) of wire of radius r = 0.0300 m lies with its face parallel to the page. It is in an external uniform perpendicular magnetic field pointing OUT as shown in the diagram below by the dot surrounded by a circle ⊙. Suppose the external magnetic field magnitude is with rate △B/△t = 10.00 What is the area A of the wire loop? What is the magnitude IεI of the voltage induced in the wire loop ? The loop has resistance R = 40.0 Ω. What is the current I in the loop? In the figure below, indicate the direction of the current I, clockwise or counter-clockwise, in the loop. Draw a labeled curved arrow on the loop representing the current direction. In the figure below, indicate the direction of the induced magnetic field , in or out. Indicate this direction by drawing a labeled IN (×) or OUT ⊙ symbol within the circle.
A circular loop having a radius of R and having a current of current I was put in a uniform magnetic field with a strength of B and it is also pointing out of the page. An angle of 30° was made by the loop with respect to the positive x axis in such a way that the loop’s right hemisphere is above the xy-plane, whereas the left hemisphere is below. This is illustrated in the figure attached. From the choices, determine the loop’s potential energy and the magnitude of the torque it experiences.
An L=57.0 cm wire is moving to the right at a speed of v=7.50 m/s across two parallel wire rails that are connected on the left side, as shown in the figure. The whole apparatus is immersed in a uniform magnetic field that has a magnitude of B=0.930 T and is directed into the screen. What is the emf E induced in the wire? If the moving wire and the rails have a combined total resistance of 1.75 Ω, what applied force F would be required to keep the wire moving at the given velocity? Assume that there is no friction between the moving wire and the rails.
A horizontal wire is free to slide on the vertical rails of a conducting frame, as in the figure. The wire has a mass (m) and length (l), and the resistance of the circuit is R. a) If a uniform magnetic field is directed perpendicularly to the frame, out of the paper, what is the the terminal (final) speed of the wire as it falls under the force of gravity? (Neglect friction) b) Is the current in the wire from A to B or B to A? [Explain your answer]
A particle with positive charge qqq is moving with speed v along the z axis toward positive z. At the time of this problem it is located at the origin, x=y=z=0. Your task is to find the magnetic field at various locations in the three-dimensional space around the moving charge. (a) Which of the following expressions gives the magnetic field at the point r→ due to the moving charge? (b) Find the magnetic field at the point r1 = x1i. (c) Find the magnetic field at the point r2 = y1j. (d) Find the magnetic field at the point r3 = x1i + z1k. (e) The field found in this problem for a moving charge is the same as the field from a current element of length dldldl carrying current i provided that the quantity qv is replaced by which quantity?
There is current I flowing in the clockwise direction in a square loop of wire that is in the plane of the paper. If the magnetic field B is toward the right, and if each side of the loop has length L,then the net magnetic torque acting on the loop is:
In Figure P19.3, assume in each case the velocity vector shownis replaced with a wire carrying a current in the direction ofthe velocity vector. For each case, find the direction of themagnetic field that will produce the magnetic force shown.