Electronics - Transformers

Exercise :: Transformers - General Questions

6. 

What is the secondary voltage in the given circuit?

A. 13.3 V rms in phase with the primary
B. 120 V rms in phase with the primary
C. 13.3 V rms out of phase with the primary
D. 120 V rms out of phase with the primary

Answer: Option C

Explanation:

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7. 

The transformer turns ratio determines

A. the ratio of primary and secondary voltages
B. the ratio of primary and secondary currents
C. the reflected impedance
D. all of the above

Answer: Option D

Explanation:

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8. 

Mutual induction is dependent on

A. winding ratios
B. output polarities
C. dc voltage levels
D. current changes

Answer: Option D

Explanation:

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9. 

What is the current through the load in the given circuit?

A. 500 mu.gifA
B. 10 mA
C. 250 mA
D. 1.25 A

Answer: Option C

Explanation:

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10. 

What is the power dissipated in the primary of the transformer in the given circuit?

A. 25 mW
B. 500 mW
C. 12.5 W
D. 62.5 W

Answer: Option D

Explanation:

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