Question

18. За допомогою реостата рівномірно збільшують силу струму в котушці зі швидкість 100А/с. Індуктивність котушки 200мГн. Знайти ЕРС самоіндукції.

Answer 1

ЭДС самоиндукции: $e= L\frac{dI}{dt}$ =0,2ГН*100A/c=20В

Answer 2

Calculating the Self-Inductance Electromotive Force (EMF)

To calculate the electromotive force (EMF) due to self-inductance, we can use the formula:

EMF = -L * (ΔI/Δt)

Where: - EMF is the electromotive force (voltage) induced in the coil - L is the inductance of the coil in henrys (H) - ΔI/Δt is the rate of change of current in amperes per second (A/s)

Given: - Rate of change of current (ΔI/Δt) = 100 A/s - Inductance (L) = 200 mH = 0.2 H

Calculation

Plugging the given values into the formula:

EMF = -0.2 H * 100 A/s

EMF = -20 V

So, the electromotive force (EMF) due to self-inductance is -20 V.