What must the magnitude of the magnetic field be in order to produce a flux of 4.50×10−4 WbWb through the surface? Express your answer with the appropriate units.

Complete Question

A horizontal rectangular surface has dimensions 2.50 cm by 3.50 cm and is in a uniform magnetic field that is directed at an angle of 34.5 degree above the horizontal.

What must the magnitude of the magnetic field be in order to produce a flux of 4.50×10−4 Wb  through the surface? Express your answer with the appropriate units.

The value is

Explanation:

From the question we are told that

  The dimension of the rectangular surface is

    The angle is  

     The magnetic flux is  

Generally the area of the rectangular surface is

=>  

Generally magnetic flux is mathematically represented as

So

=>    

=>    

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does anyone know or what?