The turns ratio of the step down transformer...

Question 1 / 205eccefa4bacbc34ba4d480f9

Question 1 of 205eccefa4bacbc34ba4d480f9

The turns ratio of the step down transformer with dual voltage secondary as shown in figure "B" of the illustration is two to one (total). If 220 volts were applied to terminals 'H1' & 'H2', what would be indicated across 'X1' & 'X4' with 'X2' & 'X3' connected and isolated? See illustration EL-0082.

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🔍 Key Concepts

• Transformer turns ratio and how primary voltage relates to secondary voltage • Configuration of a dual secondary winding (two equal secondaries in series vs. parallel) • How voltage divides between two identical secondary windings when they are connected in series and you measure from the outer terminals

💭 Think About

• First, use the 2:1 turns ratio (total) to figure out the voltage across the entire secondary when 220 V is on H1–H2. • Next, look at figure B carefully: with X2 and X3 tied together, are the two secondaries in series or parallel, and which terminals (X1, X4) represent the total secondary? • Once you know the total secondary voltage, decide whether the meter across X1–X4 sees the full secondary voltage or only one of the two equal windings.

✅ Before You Answer

• Verify that the 2:1 ratio given is for H1–H2 to X1–X4 as connected in figure B (the "total" secondary). • Confirm from the drawing that X2 and X3 are joined so the two equal secondaries form one series winding with X1 and X4 as the outer ends. • Check that you are not mistakenly taking the voltage of just one half of the secondary when the question asks for the reading across X1 and X4.

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Question 1 of 20

55 volts

110 volts

220 volts

440 volts

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Question 1 / 205eccefa4bacbc34ba4d480f9

Question 1 of 205eccefa4bacbc34ba4d480f9

Back

Question 1 of 20

5eccefa4bacbc34ba4d480f9

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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