Speedometer
In a speedometer, a magnet
rotates according to the speed of the vehicle. The magnet rotates inside an
aluminium cylinder(drum) which is held in position with the help of hair
springs. Eddy currents are produced in the drum due to the rotation of the
magnet and it opposes the motion of the rotating magnet. The drum inturn
experiences a torque and gets deflected through a certain angle depending on
the speed of the vehicle. A pointer attached to the drum moves over a calibrated
scale which indicates the speed of the vehicle.
No comments:
Post a Comment