A flux of $4.0 \times 10 ^ { - 5 } \mathrm {~T} \cdot \mathrm { m } ^ { 2 }$ is maintained through a coil of area $7.5 \mathrm {~cm} ^ { 2 }$ for $0.50 \mathrm {~s}$. What emf is induced in this coil during this time by this flux?
A) $3.0 \times 10 ^ { - 5 } \mathrm {~V}$
B) $4.0 \times 10 ^ { - 5 } \mathrm {~V}$
C) $2.0 \times 10 ^ { - 5 } \mathrm {~V}$
D) $8.0 \times 10 ^ { - 5 } \mathrm {~V}$
E) No emf is induced in this coil.

Question

Quizplus · Accepted Answer

No emf is induced because the magnetic flux through the coil does not change over the given time period. According to Faraday's law of electromagnetic induction, an emf is induced in a coil only if there is a change in magnetic flux through the coil.

A Flux Of 4.0×10−5 T⋅m24.0 \times 10 ^ { - 5 } \mathrm {~T} \cdot \mathrm { m } ^ { 2 }4.0×10−5 T⋅m2

A Flux Of $4.0 \times 10 ^ { - 5 } \mathrm {~T} \cdot \mathrm { m } ^ { 2 }$