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Homework Statement
See figure attached.
Homework Equations
The Attempt at a Solution
If we attempt to solve part a) in this question we encounter several confusions.
If we assume i(t) to be a positive current, the magnetic flux will flow through the core in a counter clockwise direction.
How are we supposed to deduce the direction of the induced voltage,
[tex]e_{ind}[/tex]
?
If you tell me whether or not i(t) is increasing or decreasing or remaning constant I can then tell you how eind relates to v.
Are we just supposed to assume it is either increasing or decreasing? If so, the relation to v to eind will have a sign difference in each case.
Assume i(t) is increasing,
[tex]e_{ind} = v = \frac{d\psi}{dt}[/tex]
Assume i(t) is decreasing,
[tex]e_{ind} = v = \frac{d\psi}{dt}[/tex]
As you can, depending on which case I assume, my expression of v will change by a negative sign.
This will affect the answer in part b).
How do we know which one to choose?
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