Which describes the magnetic flux through a section of a loop?

[McAfee]

Homework Statement

Which describes the magnetic flux through a section of a loop?

A. It is a vector that is directed outward through the section.
B. It is a vector that is directed inward through the section.
C It is a vector that is tangent to the section.
D. It is a scalar.

Homework Equations

http://edugen.wileyplus.com/edugen/courses/crs4957/halliday9118/halliday9088c30/math/math114.gif

The Attempt at a Solution

I think the answer is D because there is no direction when solving for magnetic flux.

I just want verification, thank you.

 

[McAfee]

Now I'm thinking that the answer is A.

 

[gneill]

If you look up the defining calculation for the magnetic flux you should have your answer; does the calculation produce a vector or a scalar?

 

[McAfee]

Wow. Thanks gneill. I think I know the answer.

Phi = B.A

It has SI units of the weber (Wb) which is a tesla metre squared (Tm^2) and is a scalar

Am I right?

 

[gneill]

Wow. Thanks gneill. I think I know the answer.

Phi = B.A

It has SI units of the weber (Wb) which is a tesla metre squared (Tm^2) and is a scalar

Am I right?

Yup. Equivalent units are also V-s (Volt-second). This becomes important when you start looking for induced emf's due to rates of change of flux