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Marianna [84]
3 years ago
7

11. What do foliated and un-foliated mean in metamorphic rocks?

Physics
1 answer:
Olegator [25]3 years ago
6 0

They are two types of metamorphic rocks which differ on the basis of formation and appearance.

<u>Explanation</u>:

  • Foliated metamorphic rocks are a type of metamorphic rocks which appear like layers which is caused due to heat exposure and pressure.
  • They are formed due to high pressures.
  • Examples are phyllite, slate, schist
  • Non-foliated metamorphic rocks do not have such a layered appearance.
  • They are formed due to low pressures and also because of contact metamorphism. This is why they are mostly called as hornfels.
  • Examples are hornfels, marble
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krok68 [10]

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Explanation:

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A coil of wire containing having N turns in an External magnetic Field that is perpendicular to the plane of the coil which is steadily changing. An Emf (∈) is induced in the coil.

To find :-

find the induced Emf if rate of change of the magnetic field and the number of turns in the coil are Doubled (but nothing else changes).

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   Emf induced in the coil represented by formula

                          ∈  =   -N\frac{d\phi}{dt}                                  ...................(1)

                                          Where:

                                                    .   \phi = BAcos\theta     { B is magnetic field }

                                                                                 {A is cross-sectional area}

                                                    .  N = No. of turns in coil.

                                                    .  \frac{d\phi}{dt} = Rate change of induced Emf.

Here,

Considering the case :-

                                    N1 = 2N  &      \frac{d\phi1}{dt} = 2\frac{d\phi}{dt}

Putting these value in the equation (1) and finding the  new emf induced (∈1)

                           

                                      ∈1 =-N1\times\frac{d\phi1}{dt}

                                      ∈1 =-2N\times2\frac{d\phi}{dt}

                                       ∈1 =4 [-N\times\frac{d\phi}{dt}]

                                        ∈1 = 4∈             ...............{from Equation (1)}      

Hence,

The Resultant Induced Emf in coil is 4∈.        

                           

8 0
3 years ago
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