What is meant by the term “back EMF”?

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Question 1 of 20FUuDPTFvXiCBPzl8j18x

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Question 1 of 20

FUuDPTFvXiCBPzl8j18x

What is meant by the term “back EMF”?

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🔍 Key Concepts

• Electromotive force (EMF) is a voltage, not a current • Inductive circuits (motors, coils) can generate a voltage that opposes the source • The difference between a voltage and a current in circuit terminology

💭 Think About

• Is EMF defined as a voltage or as a current? Look at the units used in textbooks and formulas. • When a motor or inductor is running, what kind of quantity is produced that opposes the applied source—voltage or current? • Re‑read each choice: which ones incorrectly mix up current and EMF as if they were the same type of quantity?

✅ Before You Answer

• Verify that EMF stands for a form of voltage (potential difference), not current. • Check which options use EMF consistently as a voltage and not as a current. • Confirm that “back” in back EMF refers to something that opposes the applied source in the circuit.

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Question 1 of 20

What is meant by the term “back EMF”?

A current equal to the applied EMF.

An opposing EMF equal to R times C (RC) percent of the applied EMF.

A voltage that opposes the applied EMF.

A current that opposes the applied EMF.

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Question 1 / 20FUuDPTFvXiCBPzl8j18x

Question 1 of 20FUuDPTFvXiCBPzl8j18x

What is meant by the term “back EMF”?

Back

Question 1 of 20

FUuDPTFvXiCBPzl8j18x

What is meant by the term “back EMF”?

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

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