What is the SI unit of magnetic flux?

Question

Which of the following compounds will be repelled when placed in an external magnetic field?

Answer 1

The correct answer is the weber.

Magnetic flux is not the same as magnetic field strength. Magnetic field strength (tesla) tells you the field at a point, while magnetic flux tells you the total field passing through an area.
Since flux equals field times area, its unit is tesla multiplied by square metre, which is renamed weber for convenience, just like a newton metre is renamed joule for energy.
The weber is named after the German physicist Wilhelm Weber, who worked on electromagnetism in the nineteenth century.
You will see the weber used whenever electromagnetic induction is discussed, since the induced EMF in a coil depends directly on how fast the magnetic flux through it is changing.

Answer 2

The correct answer is the weber.

Magnetic flux is not the same as magnetic field strength. Magnetic field strength (tesla) tells you the field at a point, while magnetic flux tells you the total field passing through an area.
Since flux equals field times area, its unit is tesla multiplied by square metre, which is renamed weber for convenience, just like a newton metre is renamed joule for energy.
The weber is named after the German physicist Wilhelm Weber, who worked on electromagnetism in the nineteenth century.
You will see the weber used whenever electromagnetic induction is discussed, since the induced EMF in a coil depends directly on how fast the magnetic flux through it is changing.

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