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why generated torque is equal and opposite to the prime mover torque in dc generators

 
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Jan24-13, 10:13 PM   #1
 

why generated torque is equal and opposite to the prime mover torque in dc generators


please make me understand that in this figure if we are applying the rotation to the prime mover in the anti clockwise direction then the current in the conductor will be in the upward direction so i m not getting that how should i relate this concept to the generated torque?
and also i came to know about it that the generated torque is equal and opposite to the direction of the motion in case of generators.how?
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