Question

При силе тока через катушку 5А. магнитный поток через нее равен 2Вб. определить энергию магнитного поля

Answer 1

I=5А, Ф=2Вб. W-? W=LI^2/2; Ф=LI; L=Ф/I; W=ФI/2=2*5/2=5 Дж.

Answer 2

Calculating Magnetic Field Energy

To calculate the energy of a magnetic field, we can use the formula:

Energy = (1/2) * L * I^2

Where: - L is the inductance of the coil in henries - I is the current flowing through the coil in amperes

Given: - Current I = 5A - Magnetic flux Φ = 2Wb

We need to find the inductance L of the coil to calculate the energy of the magnetic field.

Finding the Inductance

The inductance of the coil can be calculated using the formula:

L = Φ / I

Where: - Φ is the magnetic flux in webers - I is the current flowing through the coil in amperes

Substituting the given values: L = 2Wb / 5A

L = 0.4 H

Calculating the Energy

Now that we have the inductance L = 0.4 H and the current I = 5A, we can calculate the energy of the magnetic field using the formula:

Energy = (1/2) * L * I^2

Substituting the values: Energy = (1/2) * 0.4H * (5A)^2

Energy = 5J

So, the energy of the magnetic field is 5 joules.