the problem is stated as The Earth’s magnetic field at a certain location in the UK has a magnitude of 48 μT and is directed at 66° below the horizontal. a)Determine the magnitude of the flux of the Earth’s magnetic field through a wedding ring of diameter 2.2 cm when the ring is held in a horizontal plane. ok so i have used the equation B*A*cos(theta) the only thing slowing me down is the use of 48 μT . Im not sure how to work this into the equation. I am led to believe that μ is the permuabilty of space so not sure what is meant by μT for the magnetic field of the Earth. I have probably overlooked it in my text and cant find the relevant part now. Also i am guessing that 66° below the horizontal is equal to 66° from the perpendicular.