In a coil consisting of 75 turns, the magnetic flux is 4.8 * 10 ^ -3 degrees Wb
| July 23, 2021 | education
In a coil consisting of 75 turns, the magnetic flux is 4.8 * 10 ^ -3 degrees Wb, the time during which the current must disappear for an average induction EMF of 0.74 V to appear in the coil?
To find the duration of the disappearance of the current in the indicated coil, we use the formula: εi = N * ΔF / Δt, from where we express: Δt = N * ΔF / εi.
Values of variables: N – number of turns (N = 75 pcs.); ΔF – magnetic flux (ΔF = 4.8 * 10-3 Wb); εi – EMF of induction (εi = 0.74 V).
Let’s perform the calculation: Δt = N * ΔF / εi = 75 * 4.8 * 10-3 / 0.74 = 0.486 s.
Answer: The current in the indicated coil should disappear after 0.486 s.
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