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Question

In which of the following systems of unit, Weber is the unit of magnetic flux


A

CGS

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B

SI

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C

MKS

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D

None of the option

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Solution

The correct option is B

SI


Magnetic flux

  1. The product of the average magnetic field times the perpendicular area it penetrates is known as magnetic flux.
  2. The area vector is defined as the number of lines crossing a given area, which varies depending on the area's orientation. It's a number with a scalar value.
  3. The magnetic flux is symbolized by ϕ.
  4. In the SI system, the Weber unit of magnetic flux is used.

The explanation of the correct option

In case of option B

  1. In the SI system, the Weber unit of magnetic flux is used.
  2. The SI base units are standard measuring units defined by the international system of units (SI) for the seven base quantities of the current international system of quantities. They serve as a foundation from which all other SI units can be derived.

The explanation of the incorrect option

In case of option A

  1. CGS stands for centimeter-gram-second units.
  2. Magnetic flux density is measured in Tesla in CGS units.
  3. Maxwell (Mx) or Abweber is the CGS unit of magnetic flux (abWb).

In case of option C

  1. MKS stands for meter-kilogram-second.
  2. Magnetic flux density is measured in Weber/meter2units.
  3. Maxwell (Mx) or Abweber is the CGS unit of magnetic flux (abWb).

Hence, option B is the correct answer.


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