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tangare [24]
3 years ago
14

Que significa matematicamente que se ha debilitado en promedio un 5% el campo magnetico terrestre?

Physics
1 answer:
Neko [114]3 years ago
7 0

Answer:

Significa que, por el efecto Dynamo, la longitud del solenoide del que se deriva el magnetismo ha aumentado en un 5% en promedio en comparación con el efecto combinado del producto del número de caminos eléctricos y la corriente eléctrica dividida en el núcleo de la Tierra de modo que el mecanismo esté cambiando de modo que los polos norte y sur cambien de lugar

Explanation:

Por el cual el campo magnético de la Tierra se debe al efecto Dynamo que tenemos por simple analogía, la intensidad del campo magnético, B_c, hacia el centro de la fuente del campo magnético de la Tierra está dada por la relación;

Intensidad del campo magnético, B_c

B_c = \dfrac{\mu _0 \cdot I  \cdot N}{L}

Dónde:

B_c = Intensidad del campo magnético

μ₀ = Permeabilidad del espacio libre = Constante

N = Número de vueltas del conductor de corriente

L = longitud del solenoide

Si la fuerza del campo magnético, B_c, está aumentando, indica que

N e I disminuyen mientras L aumenta

Dado que la forma de la Tierra se aplana en los polos y las protuberancias en el ecuador, podría significar que, como se observó, los polos se están invirtiendo, lo que da la probabilidad de que cambie la orientación desde la inclinación del polo hacia el ecuador.

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Answer:

The coil with the maximum number of loops will produce the magnetic field with the maximum strength.

Explanation:

The magnetic field produced by a current-carrying coil at a point on the axis which is passing through its center and perpendicular to its plane is given by

\rm B=\dfrac{\mu_o N I }{2}\ \dfrac{R^2}{(r^2+R^2)^{3/2}}.

<em>where</em>,

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  • I = current flowing through the coil.
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Now, it is given that all the four coils have the same size, means same radius R, same material, means same permeability for all the coils, and the same amount of current is passing through all the coils, means same current I.  

The magnetic field of all the four coils is differing only due to the number of loops N.

Thus, the coil with the maximum number of loops N will produce the magnetic field with the maximum strength.

4 0
4 years ago
A circuit consists of a 6 ohm resistor, a 0.2 farad capacitor, and an AC voltage source supplying V(t) = 120 cos(20 t) volts. Wr
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Answer:

q = 24 cos (20t) (1- e (-t / 1.2))

Explanation:

To work this circuit we use the mesh equation (Kirchoff) that states that the voltage in a closed circuit is zero

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Where Vg is the generator voltage, Vr the resistance voltage and Vc the capacitor voltage

         Vg = 120 cos 20t  = V

         Vr = i R

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We see that in one term we have the current (i) and in another the load (q), but there is a relationship between the two

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Let's replace in the initial equation

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Reorder the terms

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we integrate

     ∫I dq / (V / R - 1 / RC q) = ∫ dt

We change variables

      u = (V / R - 1 / RC q)

      du = -1 / RC dq

     ∫ dq / (V / R - 1 / RC q) = -RC ∫ du / u

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We evaluate between the limits of integration, the lower t = 0 q (0) = 0

     -RC [ln (V / R - 1 / RC q) - ln (V / R)] = t

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     Ln (VC- q) = ln (VC) (-t / RC)

     VC-q = VC e (-t / RC)

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We substitute the values ​​they give us

      q = (120 cos (20t) 0.2) (1- e (-t / 6 0.2))

      q = 24 cos (20t) (1- e (-t / 1.2))

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