---
title: "A planar conducting loop moves at a constant horizontal velocity \\(\\vec{v}\\) through a region containing a magnetic field directed perpendicular to the plane of the loop. In Location 1, the loop is located entirely inside a uniform magnetic field. In Location 2, the loop is partially across the boundary, exiting the magnetic field into a field-free region. Which of the following statements correctly compares the net induced current in the loop at Location 1 and Location 2, and provides the correct physical reasoning?"
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url: "https://nerd-notes.com/ubq/118665/"
date_modified: "2026-08-04T08:13:36+00:00"
---

# A planar conducting loop moves at a constant horizontal velocity \(\vec{v}\) through a region containing a magnetic field directed perpendicular to the plane of the loop. In Location 1, the loop is located entirely inside a uniform magnetic field. In Location 2, the loop is partially across the boundary, exiting the magnetic field into a field-free region. Which of the following statements correctly compares the net induced current in the loop at Location 1 and Location 2, and provides the correct physical reasoning?

A planar conducting loop moves at a constant horizontal velocity \(\vec{v}\) through a region containing a magnetic field directed perpendicular to the plane of the loop. In Location 1, the loop is located entirely inside a uniform magnetic field. In Location 2, the loop is partially across the boundary, exiting the magnetic field into a field-free region. Which of the following statements correctly compares the net induced current in the loop at Location 1 and Location 2, and provides the correct physical reasoning?

![A horizontal diagram showing two identical rectangular wire loops moving to the right at velocity v. On the left, labeled Location 1, a rectangular loop is entirely submerged within a rectangular region filled with a uniform grid of x markers representing a magnetic field B directed into the page. On the right, labeled Location 2, a vertical dashed line represents the boundary of the magnetic field region. An identical rectangular loop is positioned such that its left half is inside the magnetic field region with x markers and its right half is outside in a blank field-free region. Horizontal arrows labeled v point to the right from both loops. No other labels or axes appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1785831215-OZDQ7G.jpg)

- **A.** There is a non-zero net induced current at Location 1 because the continuous motion through the field produces a constant motional EMF around the entire loop, whereas the net induced current at Location 2 is zero.
- **B.** There is zero net induced current at Location 1 because the magnetic flux through the loop is constant in time, whereas a non-zero net current is induced at Location 2 because the magnetic flux through the loop is changing with time.
- **C.** There is zero net induced current at Location 1 because no magnetic force acts on charge carriers moving in a uniform magnetic field, whereas a non-zero net current is induced at Location 2 because magnetic forces act only on the leading edge.
- **D.** There is a non-zero net induced current at Location 1 because the change in position of the loop creates a time-varying magnetic field inside the loop, whereas the net induced current at Location 2 is zero.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/118665/*