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**1. The problem statement, all variables and given/known data**

A uniform 4.5 T magnetic field passes perpendicularly through the plane of a wire loop .10 m^2 in area. What flux passes through the loop?

**2. Relevant equations**

Flux = (B)(A)[cos(theta)]

**3. The attempt at a solution**

Ok, according to my understanding. The equation should be set up as such:

flux = (4.5)(.10)[Cos(90)]

The cosine of 90 degrees, obviously, is zero therefore there should be no flux through the wire loop, correct? The answer sheet to this review is saying that the answer to this problem is

(b) .45 Tm^2

This would be true if the equation was the "sine of theta" rather than the cosine of theta, right? Is my equation wrong or is the review sheet wrong?!

Thanks,

-Will