Q. The coil of dynamo is rotating in a magnetic field. The developed induced e.m.f. changes and the number of magnetic lines of force also changes. Which of the following conditions is correct
A) Lines of force minimum but induced e.m.f. is zero
B) Lines of force maximum but induced e.m.f. is zero
C) Lines of force maximum but induced e.m.f. is not zero
D) Lines of force maximum but induced e.m.f. is also maximum
Explanation
(b) $e \propto \frac{d\phi}{dt};$ if $\phi \rightarrow$ maximum then $e \rightarrow$ minimum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.