A cube of edge length sits with its faces aligned to the ,

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

A cube of edge length

0.10\,\text{m}

sits with its faces aligned to the

x

y

, and

z

axes. A uniform magnetic field is given by

\mathbf B = (3.0\,\text{T})\hat\imath + (4.0\,\text{T})\hat\jmath - (2.0\,\text{T})\hat k

. What is the net magnetic flux through the top face (

+\hat k

normal) plus the front face (

+\hat\jmath

normal) of the cube? (a)

+4.0\times10^{-2}\,\text{Wb}

(b)

-6.0\times10^{-2}\,\text{Wb}

(c)

+2.0\times10^{-2}\,\text{Wb}

(d)

+6.0\times10^{-2}\,\text{Wb}