Question

Identify the wrong statement.
(a) Eddy currents are produced in a steady magnetic field.
(b) Eddy currents can be minimized by using laminated core.
(c) Induction furnace uses eddy current to produce heat.
(d) Eddy current can be used to produce braking force in moving trains.

Answer 1

(a) Eddy currents are produced in a steady magnetic field. => Wrong Statement.

• First of all , let's learn a few facts about Eddy currents.

• Eddy current is formed in a conductor is moving in a magnetic field for the magnetic field around the conductor is variable.

• Eddy currents are looped currents produced in planes perpendicular to the direction of the magnetic field intensity.

• There are various applications of Eddy current such as in braking system of train.

• Eddy currents are generated in the metallic wheels of a train when exposed to a magnetic field such that this interaction can help in slowing down the train.

• Eddy currents are are usually dissipative with loss of energy and hence can be reduced by using laminated cores.

So, the incorrect statement:

Eddy currents are produced in a steady magnetic field. (error in "steady")

$\star$ Hope It Helps.