Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A rectangular loop of length and breadth b is situated in a uniform magnetic field of induction B with its plane perp

A rectangular loop of length \ell and breadth b is situated in a uniform magnetic field of induction B with its plane perpendicular to the field as shown in the figure. What is the induced e.m.f. if the loop is rotated with constant angular velocity \omega, about an axis passing through the centre parallel to the breadth through angle 180^{\circ} .

Option: 1

\mathrm{\frac{B \ell b \omega}{\pi}}


Option: 2

\mathrm{\frac{2 B \ell b \omega}{\pi}}


Option: 3

\mathrm{\frac{B \ell b \omega}{2 \pi}}


Option: 4

None


Answers (1)

best_answer

When the loop is rotated through180^{\circ} about an axis passing through centre and parallel to breadth then the change in magnetic flux

\mathrm{\mathrm{d} \phi=-\mathrm{B} \ell \mathrm{b}-(\mathrm{B} \ell \mathrm{b})=-2 \mathrm{~B} \ell \mathrm{b} .}

\mathrm{\therefore \text { The induced e.m.f. }}

\mathrm{\begin{aligned} & \mathrm{e}=-\frac{d \phi}{d t} \Rightarrow e=+\frac{2 B \ell b}{\left(\frac{\pi}{\omega}\right)} \\ & \Rightarrow e=\frac{2 B \ell b \omega}{\pi} \end{aligned}}

 

Posted by

mansi

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

Karnataka: NEET candidate dies by suicide; no note recovered
anam-khan

CBSE Re-evaluation Row: Dharmendra Pradhan seeks detailed report on technical failures
anam-khan

Before NEET, CMC Vellore’s unique MBBS admissions tested aptitude along with merit; paper-leak restarts debate

Latest Question