Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
322 views
in Physics by (42.5k points)
closed by

A coil of number of turns N, area A is rotated at a constant angular speed ω, in a uniform magnetic field B and connected to a resistor R. Deduce expression for 

(i) Maximum emf induced in the coil. 

(ii) Power dissipation in the coil.

1 Answer

+1 vote
by (44.7k points)
selected by
 
Best answer

Suppose initially the plane of coil is perpendicular to the magnetic field B. When coil rotates with angular speed ω, then after time t, the angle between magnetic field \(\vec{B}\) and normal to plane of coil is

θ = ωt 

∴ At this instant magnetic flux linked with the coil φ = BA cos ωt 

If coil constants, N-turns, then emf induced in the coil

= +NBA ω sin ωt .....(i)

∴For maximum value of emf ε,

sin ωt =1 

∴ Maximum emf induced, εmax = NBA ω

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...