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The steady speed of the disc in the energy meter is achieved when

The steady speed of the disc in the energy meter is achieved when Correct Answer Operating torque is equal to the braking torque

  • In an energy meter, the braking torque is produced to maintain a steady speed and equal to driving torque
  • A permanent magnet positioned near the edge of the aluminium disc from the braking system
  • The aluminium disc (shown in the figure) moves in the field of this magnet and thus providing the braking torque
  • The position of the permanent magnet is adjustable, and therefore, braking torque can be adjusted by shifting the permanent magnet to different radial positions 

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