1. Tardigrade
  2. Question
  3. Physics
  4. A semicircular wire of radius R is rotated with constant angular velocity ω about an axis passing through one end and perpendicular to the plane of the wire. There is a uniform magnetic field of strength B. The induced e.m.f. between the ends is: <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/p-ttn2ilfp4v1jk675.jpg />

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A semicircular wire of radius $R$ is rotated with constant angular velocity $\omega $ about an axis passing through one end and perpendicular to the plane of the wire. There is a uniform magnetic field of strength $B.$ The induced e.m.f. between the ends is :
Question

NTA AbhyasNTA Abhyas 2020

Solution:

$e=\frac{B \omega L^{2}}{2}$
effective length of the wire frame is $2R$
$\Rightarrow e=2B\omega R^{2}$