# Electrical Engineering - Transformers

### Exercise :: Transformers - General Questions

16.

A certain amplifier has 600 internal resistance looking from its output. In order to provide maximum power to a 4 speaker, what turns ratio must be used in the coupling transformer?

 A. 8 B. 0.8 C. 0.08 D. 80

Explanation:

No answer description available for this question. Let us discuss.

17.

A transformer

 A. changes ac to dc B. changes dc to ac C. steps up or down dc voltages D. steps up or down ac voltages

Explanation:

No answer description available for this question. Let us discuss.

18.

The primary of a transformer is connected to a 6 V battery. The turns ratio is 1:3 and the secondary load, RL, is 100 . The voltage across the load is

 A. 0 V B. 6 V C. 18 V D. 2 V

Explanation:

No answer description available for this question. Let us discuss.

19.

To step 120 V ac up to 900 V ac, the turns ratio must be

 A. 75 B. 750 C. 7.5 D. 0.13

Explanation:

No answer description available for this question. Let us discuss.

20.

When a 200 load resistor is connected across the secondary winding of a transformer with a turns ratio of 4, the source "sees" a reflective load of

 A. 50 B. 12.5 C. 800 D. 0 