Advertisements
Advertisements
प्रश्न
Answer in brief:
If a copper disc swings between the poles of a magnet, the pendulum comes to rest very quickly. Explain the reason. What happens to the mechanical energy of the pendulum?
उत्तर
The shifting magnetic flux through the copper disc causes eddy current in the disc as it enters and exits the magnetic field. The opposing magnetic force dampens the motion in both circumstances, according to Fleming's right-hand rule. The mechanical energy is depleted after a few swings, and the motion comes to a halt. The disc is warmed by joule heating caused by the eddy current. As a result, the pendulum's mechanical energy is converted into thermal energy.
APPEARS IN
संबंधित प्रश्न
The role of inductance is equivalent to ______
A plane of a coil of 10 turns is tightly wound around a solenoid of diameter 2 cm having 400 turns per centimeter. The relative permeability of the core is 800. Calculate the inductance of the solenoid.
A coil of n turns and resistance R Ω is connected in series with a resistance `"R"/2`. The combination is moved for time t second through magnetic flux ϕ1 to ϕ2, The induced current in the circuit is ______.
