Electronics-Transformers Question and Answer
Electronics-Transformers Question and Answer
11. The reflected load value that the source sees will always be larger than the load value itself.
- TRUE
- FALSE
12. An open secondary winding of a transformer will cause the primary current to be nearly zero.
- TRUE
- FALSE
13. The secondary voltages produced by a center-tapped transformer are equal in amplitude but 180° out of phase with respect to the center tap.
- TRUE
- FALSE
14. A transformer that has 700 turns in the primary and 35 turns in the secondary has a turns ratio of 20:1.
- TRUE
- FALSE
15. Regardless of whether the transformer is step-up or step-down, power in the primary equals the power in the secondary if there is 100% efficiency.
- TRUE
- FALSE
16. For mutual inductance to occur, the two coils must be at right angles to each other.
- TRUE
- FALSE
17. If the current drawn in the secondary of a transformer increases, the power in the primary should remain the same.
- TRUE
- FALSE
18. If an analog signal is to be converted to an 8-bit resolution, how many comparators are used in a parallel-encoded ADC?
- 127
- 128
- 255
- 256