A 3 HP 100 V DC motor is 85% efficient when...

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Question 1 of 20xps4rrEW039J4aOUSgcn

A 3 HP 100 V DC motor is 85% efficient when developing its rated output. What is the current?

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xps4rrEW039J4aOUSgcn

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A 3 HP 100 V DC motor is 85% efficient when developing its rated output. What is the current?

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🔍 Key Concepts

• Relationship between horsepower and watts (power conversion) • Definition of efficiency = output power / input power • Basic DC power formula P = V × I

💭 Think About

• First, convert the motor’s rated horsepower to watts so you know the output power in watts. • Use the efficiency to find the input power from the output power. • Once you know the input power and the voltage (100 V), solve P = V × I for current and compare with the choices.

✅ Before You Answer

• Confirm the correct HP-to-watts conversion factor before calculating. • Be sure you are using input power (not output) when applying P = V × I. • After calculating current, check that your result is close to one of the multiple-choice options and that the units are amperes (A).

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Question 1 of 20xps4rrEW039J4aOUSgcn

A 3 HP 100 V DC motor is 85% efficient when developing its rated output. What is the current?

Back

Question 1 of 20

xps4rrEW039J4aOUSgcn

Q

A 3 HP 100 V DC motor is 85% efficient when developing its rated output. What is the current?

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Relationship between horsepower and watts (power conversion) • Definition of efficiency = output power / input power • Basic DC power formula P = V × I

💭 Think About

• First, convert the motor’s rated horsepower to watts so you know the output power in watts. • Use the efficiency to find the input power from the output power. • Once you know the input power and the voltage (100 V), solve P = V × I for current and compare with the choices.

✅ Before You Answer

• Confirm the correct HP-to-watts conversion factor before calculating. • Be sure you are using input power (not output) when applying P = V × I. • After calculating current, check that your result is close to one of the multiple-choice options and that the units are amperes (A).

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

Quick actions

— No credit card needed