Question

What is the inductance of a coil if the coil produces an emf of 2.50 v when the current in it changes from -28.0 mA to 25.0 mA in 12.0 ms? express your answer using 3 significant figures.

Answer 1

≈ 0,566 H

Step-by-step explanation:

First, let's find how much the current has changed:

∆I = I2 - I1 = 25 - (-28) = 53 mA = 0,053 A

Given:

∆t = 12 ms = 0,012 s

E = 2,50 V

Find: L - ?

`e = | - l * (∆i)/(∆t) |`

`l = | - (e * ∆t)/(∆i) | = | - (2.5 * 0.012)/(0.053) | ≈ 0.566`