All questions
AP Physics C: E&M
13.3 Induced Currents and Magnetic Forces
13.2 Electromagnetic Induction
AdvancedMCQMathematicalProportional AnalysisConceptual14.1k
A top-down view of a horizontal rectangular rail system. Two parallel horizontal line segments represent conducting rails separated vertically by a distance labeled \(\ell\). At the left end, the two rails are connected to the two parallel plates of a capacitor labeled \(C\). A vertical line segment representing a conducting rod of mass \(m\) and length \(\ell\) rests perpendicularly across both rails. A horizontal arrow pointing to the right originates at the midpoint of the rod and is labeled \(F\). A uniform magnetic field is indicated by an array of exactly six evenly spaced \(\times\) symbols distributed between the rails, with a single label \(\vec{B}\) placed near the top right. No other labels, lines, text, or axes appear.
Conducting rod on frictionless rails connected to an ideal capacitor in a uniform magnetic field.
A conducting rod of mass \(m\) and length \(\ell\) is placed on two parallel, horizontal, frictionless conducting rails separated by a distance \(\ell\) in a uniform vertical magnetic field of magnitude \(B\). The rails are connected at one end to an ideal capacitor of capacitance \(C\), and the electrical resistance of the rails and rod is negligible. Starting from rest at time \(t = 0\), a constant external horizontal force \(F\) pulls the rod along the rails directed away from the capacitor. Which of the following statements correctly describes the motion of the rod in the limit as \(t \to \infty\)?

Log In to Continue

Accounts are free! Log in to try this question, see explanations, save progress, and more!

Tools for a 5