WEBVTT
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We're told that we have a long, straight wire
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carrying a current of two amperes placed along the access
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of a cylinder which has a radius of 20.5 meters
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and a length of three meters. And it wants
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us to determine the total magnetic flux through the cylinder
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. Okay, well, from the right hand thumb
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rule, we can say that the direction the direction
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of the current along the thumb and the magnetic field
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is upwards. I'II tangent to the surface of the
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cylinder. So that night, no magnetic field lines
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penetrate the cylindrical surface. So therefore, since the
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magnetic flux is five be equal to be magnetic field
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times the area times the co sign of the angle
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Fada. But from the right hand rule, we
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determined that data here is equal to 90 degrees and
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the coastline of 90 degrees is equal to zero.
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Therefore, the magnetic flux is gonna be equal to
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zero