1.

An electric motor operates on a 50 volt supply and a current of 12A. If the efficiency of the motor is 30%, what is the resistance of the winding of the motor    [Kerala PET 2002]

A. \[6\Omega \] 
B. \[4\Omega \]
C. End B, \[3\times {{10}^{-3}}\,mV\]  
D. \[3.1\Omega \]
Answer» D. \[3.1\Omega \]


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