Which of the listed conditions will occur if...

Question 1 / 205eccefa3bacbc34ba4d4805d

Question 1 of 205eccefa3bacbc34ba4d4805d

Which of the listed conditions will occur if the polarity of the field poles and the direction of current to the brushes of a DC motor were both reversed?

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Question 1 of 20

5eccefa3bacbc34ba4d4805d

Which of the listed conditions will occur if the polarity of the field poles and the direction of current to the brushes of a DC motor were both reversed?

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🔍 Key Concepts

• DC motor basics – relationship between field polarity, armature current, and direction of rotation • Right‑hand rule / motor rule – how magnetic field and current direction determine torque direction • What happens when both the field polarity and armature (brush) current direction are changed at the same time

💭 Think About

• First, imagine what happens if you reverse only the armature current with the field kept the same. What does that usually do to the direction of rotation? • Next, imagine what happens if you reverse only the field polarity and keep the armature current the same. How does that affect the torque direction? • Now combine both changes: if you reverse both field polarity and armature current together, how does the torque (and therefore rotation) compare with the original case?

✅ Before You Answer

• Be clear on how torque direction in a DC motor depends on both magnetic field direction and current direction in the armature conductors • Distinguish between effects that would prevent starting (e.g., no field vs. reversed field) and effects that would cause overheating (e.g., shorted turns), and see if either really applies here • Verify whether making two equal and opposite changes (field and armature) cancels, doubles, or otherwise alters the net torque direction on the armature

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Question 1 of 20

Which of the listed conditions will occur if the polarity of the field poles and the direction of current to the brushes of a DC motor were both reversed?

The motor would not start.

The direction of rotation of the armature would be reversed.

The direction of rotation of the armature would be unchanged.

The field pole windings would become overheated.

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Question 1 / 205eccefa3bacbc34ba4d4805d

Question 1 of 205eccefa3bacbc34ba4d4805d

Which of the listed conditions will occur if the polarity of the field poles and the direction of current to the brushes of a DC motor were both reversed?

Back

Question 1 of 20

5eccefa3bacbc34ba4d4805d

Which of the listed conditions will occur if the polarity of the field poles and the direction of current to the brushes of a DC motor were both reversed?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed