QUESTION7 What is an isolation transformer? O A transformer which allow current

Question

QUESTION7 What is an isolation transformer? O A transformer which allow current to flow from the primary windings to the secondary windings. O A transformer which has the same windings for the primary and secondary. O A transformer which has its primary and secondary windings electrically and mechanically separated from each other O A transformer that changes the frequency. QUESTION 8 A transformer has a primary voltage of 480V and a turn ratio of 4:1. What is the secondary voltage? O 4160V O 1920V 120V QUESTION 9 nf rorictance The nrimary wnltape is 240V. What is the

Explanation / Answer

ANSWER A:

Isolation transformers are used for isolation of conduction paths between primary and secondary windings to protect it from unnecessary current and DC component of signals. Hence the Answer is C .

ANSWER B:

As turns ratio is 4, which is equal to Primary Voltage / Secondary Voltage. So, the Secondary Voltage is Primary Voltage / Turns Ratio, which is equal to 480/4, that is 120 V. So, Answer is D.

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