All questions
AP Physics 2
12.4 Electromagnetic Induction and Faraday’s Law
IntermediateMCQMathematicalConceptual13.2k
A horizontal circular disk of radius \(R\) shown in perspective as a thin tilted ellipse. A vertical dashed line passes through the center of the disk to represent the rotation axis, with a curved arrow near the top labeled \(\omega\) indicating clockwise rotation when viewed from above. Uniform magnetic field vectors, represented by four evenly spaced vertical downward arrows labeled \(\vec{B}\), pass perpendicularly through the disk. A stationary conductive wire brush makes contact with the central axis, and a second brush touches the outer edge of the disk. These brushes connect to two outer wire leads leading toward an external resistor symbol labeled \(R_{\text{ext}}\). No other labels, lines, text, or axes appear.
A copper disk of radius \(R\) rotating at angular speed \(\omega\) in a uniform magnetic field \(\vec{B}\).
A flat, circular copper disk of radius \(R\) rotates about its central axis with a constant angular speed \(\omega\). A uniform magnetic field of magnitude \(B\) is directed perpendicular to the surface of the disk. Stationary electrical brushes touch the central axle and the outer rim of the disk to connect them across an external resistor, forming a closed circuit.

Which of the following statements correctly identifies the potential difference \(\Delta V\) generated between the central axle and the outer rim, along with the physical explanation for its generation?

Log In to Continue

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

Similar Questions

Tools for a 5

The Quiz Lab library of AP Physics quizzes AP aligned mock tests to help you get a 5. With grading, adaptive explanations, and more. Find a Quiz Find, solve, and grade every AP FRQ ever. Find an FRQ Stuck on AP Physics 2? Get unstuck with an AP specialist.1 to 1 tutors who know the exam inside out. Understand weeks of material in a single session.Find a Tutor Learn AP Physics from scratch, quickly. This is the only course you'll need for the year. A self-paced course with everything you need to get a 5. Trusted by over 15,000 students and 200+ schools. Learn fast, or we'll refund your purchase, backed by our 100% satisfaction guarantee. Explore the Course