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Mr. Dubey • 52.30K Points
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Q. Choose the correct one. (* stands for multiplication, J represents the moment of inertia, w represents angular speed).

(A) j*d(w)/dt = load torque – motor torque
(B) j*d(w)/dt = load torque + motor torque
(C) j*d(w)/dt = motor torque – load torque
(D) j*d(w)/dt = load torque * motor torque
Correct : Option (C)

Explanation: 
 j*d(w)/dt = motor torque – load torque is the dynamic equation of the motor. motor torque will try to aid the motion of the motor, but load torque will oppose the motion of motor that’s why it subtracts in the equation.

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