A bar magnet is held stationary while a circular loop of wire is moved toward the magnet at constant velocity at position A as in the figure below. The loop passes over the magnet at position B and moves away from the magnet at position C. (For the following questions, state the directions as if you were to the right of the magnet, watching the loop of wire move away from you.) B (a) Find the direction of the induced current in the loop using Lenz's law at position A. clockwise O counterclockwise O No current is induced. (b) Find the direction of the induced current in the loop using Lenz's law at position C. O clockwise O counterclockwise No current is induced. (c) What is the induced current in the loop at position B? (Position B has the center of the loop exactly at the midpoint of the bar magnet.) O clockwise O counterclockwise O No current is induced. Explain.

A bar magnet is held stationary while a circular loop of wire is moved toward the magnet at constant velocity at position A as in the figure below. The loop passes over the magnet at position B and moves away from the magnet at position C. (For the following questions, state the directions as if you were to the right of the magnet, watching the loop of wire move away from you.) B (a) Find the direction of the induced current in the loop using Lenz's law at position A. clockwise O counterclockwise O No current is induced. (b) Find the direction of the induced current in the loop using Lenz's law at position C. O clockwise O counterclockwise No current is induced. (c) What is the induced current in the loop at position B? (Position B has the center of the loop exactly at the midpoint of the bar magnet.) O clockwise O counterclockwise O No current is induced. Explain.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter14: Inductance

Section: Chapter Questions

Problem 85CP: A square loop of side 2 cm is placed 1 cm from a long wire carrying a current that varies with time...

See similar textbooks

Similar questions

A circular loop of wire sits face on to 2 tesla magnetic field that points into the page, as shown in the upper diagram at right. The wire loop is turned a quarter turn by a crank, so that the right edge of the loop drops into the page and the left side of the loop comes out of the page. The radius of the loop is 20cm and the quarter turn takes 0.5 seconds. (a) What is the average emf induced in the loop, and does the current in the wire flow in the direction of the arrow on the loop or in the opposite direction? (b) If the crank continues to turn the loop another quarter turn in 0.5 seconds in the same direction, until it looks like the bottom picture, what will be the average emf induced in the wire, and does the current in the wire flow in the direction of the arrow or in the opposite direction?
In the diagram above, a bar magnet is brought closer to a conducting wire loop with 7 Ω of resistance. As a result a uniform 3 A current is induced in the wire. What is the direction of the induced magnetic field at the center of the loop? Explain the reasoning behind your selection in detail.A) UpB) DownC) ClockwiseD) CounterclockwiseE) Cannot be determined
In the figure below, a uniform magnetic field of 0.5 T points directly into the plane of the paper as shown below. The bottom section acts as a velocity selector, so that the crossed electric field (uniform in the entire region) of strength 2.08X105 V/m and magnetic field allows only positive ions q with a certain velocity to reach the slit S1. After passing through the S1, the singly ionized positive ions experience a magnetic force only (same uniform magnetic field as bottom section), which can separate isotopes with different masses, and only selected mass will reach one of the slits S2 or S3. a. What is the mass of the particles that will reach the second slit, if the distance between the slits are 40 cm (1 and 2 or 1 and 3). b. If the magnetic field is doubled in both regions, while keeping electric field same what is the new mass that will reach the second slit S2/S3.
A square loop of side 2 cm is placed 1 cm from a long wire carrying a current that varies with time at a constant rate of 3 A/s as shown below. (a) Use Ampère’s law and find the magnetic field as a function of time from the current in the wire. (b) Determine the magnetic flux through the loop. (c) If the loop has a resistance of 3 Ω , how much induced current flows in the loop?
A straight wire carries a current when which is changing in time as shown in the right graph. At what time period A to D is the induced current in the loop positioned nearby is the largest absolute value.
What is the direction of the magnetic field that produces themagnetic force on a positive charge as shown in each of thethree cases in the figure below, assuming B is perpendicularto v ?
In the closed loop below, the current is counterclockwise and equals I. What is the Magnetic field at point P and its directions?
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.
It is desired to use a magnetic field of 2.00 x10^-4 teslas to produce a total magnetic flux of 6.28 x10^-8 webers through a circular loop of wire. How should the loop be oriented relative to the field if we want to achieve this with the smallest loop possible? (Draw a picture to express your answer.) What will be the radius of the wire loop required?
The 24.7 cm wide, zero resistance slide wire shown in the diagram above is pushed toward the 6.89 Ω resistor at a steady speed of 0.894 m/s. The magnetic field strength is 0.771 T. How big (in N) is the pushing force? What is the magnitude of the induced current (in A)?
As shown below, a square loop of wire of side a moves through a uniform magnetic field of magnitude B perpendicular to the page at constant velocity, vector v, directed to the right. Which statement regarding the electric field induced in the wires is correct for the wires at the left and right sides of the loop? (Hint: Be careful of what is being asked here. I am not asking for the direction of current.)
Show all your calculations while explaining why you do each step.An electron enters a region of uniform 0.10T magnetic field (into the page) with a kinetic energy of 100 keV. Can you calculate the radius of the curved path that it will take? (And include a diagram that shows which way the path curves).