Eddy currents are
ASteady DC currents in straight wires
BCirculating induced currents in bulk conductors exposed to changing magnetic flux
CCurrents flowing only through superconductors
DCurrents in vacuum
Answer & Solution
Correct answer: B. Circulating induced currents in bulk conductors exposed to changing magnetic flux
Eddy currents arise when flux through a bulk conductor changes. They cause heating (used in induction cookers) and braking (electromagnetic brakes). Laminations in transformer cores REDUCE eddy losses.
Related questions
The coil of an AC generator connects to the outside circuit through:A coil is labelled 2 H. The H stands for the unit called the:A magnet dropped through an aluminium pipe, compared with a PVC pipe, takes:Some trains brake with electromagnets held above the rails. The braking feels:Cutting slots in the swinging copper plate makes it:A copper plate swings between the poles of a magnet and soon stops. The cause is:A loop moves while lying fully inside a uniform magnetic field. The induced current is:Where does the work you do pushing the magnet into the coil end up?