As shown in the illustrated diagnostic setup...

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Question 1 of 2066636eed28f7522a1c51db0b

As shown in the illustrated diagnostic setup for locating a shorted field coil of a ten-pole synchronous motor, if 240 VAC/60 Hz is applied across the brushes, what would be the individual voltage drops measured across each field coil assuming that none of the field coils are shorted? Illustration EL-0202

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Question 1 of 20

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🔍 Key Concepts

• How voltage divides in a series circuit when all resistances are equal • How many field coils are actually in series between the two brushes in this ten-pole motor • Using total applied voltage ÷ number of equal coils to find individual coil voltage drop

💭 Think About

• From the illustration, trace the path of current from one brush, through all the field coils, to the other brush. How many coils does it pass through? • If the 240 VAC is applied across the entire field circuit, and each coil has the same resistance, what share of the total voltage does each coil get? • Compare your calculated per-coil voltage with the answer choices. Which one matches your result?

✅ Before You Answer

• Be sure you are counting the number of poles/field coils actually in the series path (ten-pole motor) • Confirm you are treating the coils as equal resistances in series, not parallel • Double-check your math when you divide 240 VAC by the number of coils to get the voltage per coil

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