What is the initial magnetic flux permeating the circuit if, when it decreases uniformly
| June 30, 2021 | education
What is the initial magnetic flux permeating the circuit if, when it decreases uniformly to zero for 0.2 s, an EMF of 0.02 V is indicated in the coil.
These tasks: Ф (final magnetic flux in the circuit) = 0 Wb; Δt (time of decay of magnetic flux in the coil) = 0.2 s; ε (EMF that was induced in the coil) = 0.02 V.
The initial magnetic flux that permeated the contour can be expressed from the formula: ε = – (Ф – Ф0) / Δt = Ф0 / Δt, whence Ф0 = ε * Δt.
Calculation: Ф0 = 0.02 * 0.2 = 0.004 Wb (4 mWb).
Answer: The initial magnetic flux was 4 mWb.
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