[amp_mcq option1=”Demagnetization of leading pole tip and magnetization of trailing pole tip” option2=”Demagnetization of trailing pole tip and magnetization of leading pole tip” option3=”Demagnetizing the center of all poles” option4=”Magnetizing the center of all poles” correct=”option1″]
The correct answer is: A. Demagnetization of leading pole tip and magnetization of trailing pole tip.
Armature reaction is the effect of the armature current on the magnetic field of the stator. The armature current creates a magnetic field that opposes the main magnetic field. This causes the leading pole tip to be demagnetized and the trailing pole tip to be magnetized.
The following is a brief explanation of each option:
- Option A: Demagnetization of leading pole tip and magnetization of trailing pole tip. This is the correct answer. The armature current creates a magnetic field that opposes the main magnetic field. This causes the leading pole tip to be demagnetized and the trailing pole tip to be magnetized.
- Option B: Demagnetization of trailing pole tip and magnetization of leading pole tip. This is the incorrect answer. The armature current creates a magnetic field that opposes the main magnetic field. This causes the leading pole tip to be demagnetized and the trailing pole tip to be magnetized.
- Option C: Demagnetizing the center of all poles. This is the incorrect answer. The armature current creates a magnetic field that opposes the main magnetic field. This causes the leading pole tip to be demagnetized and the trailing pole tip to be magnetized. The center of all poles is not affected.
- Option D: Magnetizing the center of all poles. This is the incorrect answer. The armature current creates a magnetic field that opposes the main magnetic field. This causes the leading pole tip to be demagnetized and the trailing pole tip to be magnetized. The center of all poles is not affected.