Electrical Engineering XYZ MCQs

For P pole machine relation between electrical degrees and mechanical degrees is:

- θ
_{elec}= 4/P × θ_{mech} - θ
_{elec}= 2/P × θ_{mech} - θ
_{elec}= θ_{mech} - θ
_{elec}= P/2*θ_{mech}

Correct answer: 4. θ_{elec} = P/2*θ_{mech}

Explanation: In a P-pole machine, the number of electrical cycles per revolution (360 degrees) is equal to the number of pole pairs (P/2). Therefore, the electrical angle (θ_{elec}) for a given mechanical angle (θ_{mech}) can be determined by multiplying the mechanical angle by the ratio of pole pairs to 2. Hence, the correct relation is:

θ_{elec} = P/2 × θ_{mech}

This equation establishes the relationship between the electrical and mechanical angles in a P-pole machine, allowing engineers to analyze and design electrical machinery accurately.