Eddy Currents
Eddy Currents: Overview
This topic covers concepts, such as Eddy Currents, Direction of Eddy Current, Method to Minimize Eddy Currents, Application of Eddy Currents, Magnetic Braking in Trains, Electromagnetic Damping, Induction Furnace, Electric Power Meters, etc.
Important Questions on Eddy Currents
Eddy currents developed on a conductor moving in a magnetic field will tend to
A bar magnet of mass is suspended from the ceiling with a massless string and is set into oscillations. A gold metal plate is brought close to the oscillating pendulum. The oscillations will damp due to induction of eddy currents in the metal. Which one of the following statements is true if the gold plate is replaced by a steel plate having the same physical dimensions. (Of the two, note that gold is a better conductor of electricity.)
Electromagnetic damping is inversely proportional to
Electromagnetic damping is similar to
Electromagnetic damping is associated with:
Which of the following is a disadvantage of eddy currents?
The working of an analogue type electric power meter is based on
Which of the following is responsible for the working of an analogue electric power meter?
Which of the following is essential for the working of an induction furnace?
On what principle does an induction furnace works?
Which of the following does not use the application of eddy current?
Assertion: A thin aluminium disc, spinning freely about a central pivot, is quickly brought to rest when placed between the poles of a strong U-shaped magnet.
Reason: A current induced in a disc rotating in a magnetic field produces a force which tends to oppose the motion of the disc.
Assertion: A thin aluminium disc, spinning freely about a central pivot, is quickly brought to rest when placed between the poles of a strong U-shaped magnet.
Reason: A current induced in a disc rotating in a magnetic field produces a force which tends to oppose the motion of the disc
When a metallic plate swings between the poles of a magnet
