Question Detail

Which of the following statement/s is/are justified Gap contraction factor for the ducts?

Options

Option A: The average value of flux density must be taken into account to calculate the MMF required for the airgap.
Option B: The reluctance of the airgap with slotted armature will be more as compared to the smooth armature (core) machine.
Option C: The airgap reluctance for a machine having ventilation ducts will be more than a machine having no ventilation ducts.
Option D: All of these

Correct Answer

<tr> <td style="width: 30px; text-align: center;"></td> <td class=""> <p>The airgap reluctance for a machine having ventilation ducts will be more than a machine having no ventilation ducts.</p> </td> </tr>

Solution & Explanation

Answer: Option (c)

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Which of the following statement/s is/are justified Gap contraction factor for the ducts?

The average value of flux density must be taken into account to calculate the MMF required for the airgap.

The reluctance of the airgap with slotted armature will be more as compared to the smooth armature (core) machine.

The airgap reluctance for a machine having ventilation ducts will be more than a machine having no ventilation ducts.

All of these

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