Even though ɸB is not a vector, we can think of it as having a direction, the
direction A.
For the SAT Physics Subject Test, remember that changes in magnetic flux induce
emf. According to Faraday’s law of electromagnetic induction, the emf induced
in a circuit is equal to the rate of change of the magnetic flux through the circuit.
This can be written mathematically as
Stick With It!
Don’t get stressed! As
difficult as electromagnetism
may seem, the SAT
Physics Subject Test will
lay most of these concepts
out for you, which means
that you can probably get
by with a solid grasp of
the basic concepts and a
knowledge of how to use
the equations.