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?

Question

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 is minimum but induced e.m.f. is zero. (B) Lines of force is maximum but induced e.m.f. is zero. (C) Lines of force is maximum but induced e.m.f. is not zero. (D) Lines of force is maximum but induced e.m.f. is also maximum.

Tardigrade Admin · Accepted Answer

e propto (d φ/d t) ; if φ arrow maximum, then e arrow minimum.

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?

Lines of force is minimum but induced e.m.f. is zero.

Lines of force is maximum but induced e.m.f. is zero.

Lines of force is maximum but induced e.m.f. is not zero.

Lines of force is maximum but induced e.m.f. is also maximum.

$e \propto \frac{d ϕ}{d t};$ if $ϕ \to$ maximum, then $e \to$ minimum.

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?

Lines of force is minimum but induced e.m.f. is zero.

Lines of force is maximum but induced e.m.f. is zero.

Lines of force is maximum but induced e.m.f. is not zero.

Lines of force is maximum but induced e.m.f. is also maximum.

e∝dtdϕ​; if ϕ→ maximum, then e→ minimum.

$e \propto \frac{d ϕ}{d t};$ if $ϕ \to$ maximum, then $e \to$ minimum.