Daily Practice Problems

📝 SolutionEddy currents are circulating (loop-like) currents induced within the volume of a conductor when it experiences a changing magnetic flux, causing energy loss as heat.

📝 SolutionUsing thin laminated iron sheets, insulated from one another, breaks up the conducting paths and increases resistance to eddy currents, reducing energy loss.

📝 SolutionSelf-inductance $L$ is defined by $N\phi = LI$, i.e. the flux linkage per unit current flowing through the coil itself.

📝 SolutionInductance (both self and mutual) is measured in henry (H), where $1\ H = 1\ \frac{Wb}{A}$.

📝 SolutionMutual inductance depends on the number of turns, area, relative orientation and separation of the two coils — essentially on their geometry and coupling.