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What are whirlpool currents? and their applications.

whirlpool currents-

when any shape or Shape If a conductor is driven in a magnetic field or placed in a changing magnetic field, the magnetic flux associated with the conductor changes,

What are whirlpool currents? and their applications.

whereby the driver complete Induced currents are produced in the volume which oppose the motion of the conductor or the change in magnetic flux. Because these currents are circular like whirlpool currents generated in water, so these streams are called whirlpool currents it is said. Scientists discovered these currents foco so these currents Foco currents also say.

These currents can be so strong that the conductor can become hot and red hot. The value of induced currents depends on the resistance of the conductor. If the resistance of the conductor is high, the vortex currents are attenuated. Conversely, if the resistance of the conductor is low, the vortex currents become stronger.

Applications of whirlpool currents-

  1. They are used in induction furnace. In this, the metal is placed in a strongly variable magnetic field, which generates strong eddy currents in the metal and generates so much heat that the metal melts.
  2. They are used to make the galvanometer stop oscillation. The coil of the galvanometer is made by wrapping a copper insulating wire on an aluminum frame. When the coil is deflected, vortex currents are generated in the frame which oppose the motion of the coil. Therefore, the coil gets deflected and soon stops in the appropriate position.
  3. Whirlpool currents are used as electric brakes to stop electric trains. Along with the axle of the wheel is a metal drum which rotates along with the wheel. When the train has to stop, a strong magnetic field is generated near the drum which induces eddy currents in the drum which oppose the motion of the drum and the train stops.

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