How Can the Windings Ratio Be Safely Determined for an Unmarked

question 39

Multiple Choice

How can the windings ratio be safely determined for an unmarked transformer?

• A)Standardized wire color codes indicate windings ratio.
• B)The turns ratio is the same as the ratio of primary resistance to secondary resistance ratio.
• C)Apply known low voltage ac to the primary and measure the secondary output. The ratio of the voltages is the same as the windings ratio.
• D)either A or C

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