Cross magnetization effects which of the following

Electrical Engineering XYZ MCQs

Cross magnetization effects which of the following:

1. Reduces the terminal voltage
2. Commutation
3. Both 1 and 2
4. Reduction in main field flux

Correct answer: 2. Commutation

Explanation: Cross magnetization primarily affects commutation in a DC machine. Therefore, the correct option is: Commutation

1. Cross magnetization refers to the magnetization of the interpolar region due to armature current. This can result in a non-uniform distribution of current in the coil undergoing commutation, impacting the commutation process.
2. Commutation is the process of reversing the current in a coil at the moment it goes from being under one pole to being under the next pole. Cross magnetization can cause disturbances in the commutation process, leading to sparking and poor performance of the machine.