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TRANSFORMERS

Transformers
The turns ratio required to match an 80 source to a 320 load is

2
80
20
4

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Transformers
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is

240 V
12 V
120 V
2,400 V

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Transformers
If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ?

6250 Ω
250 Ω
62500 Ω
25 Ω

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Transformers
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

0.4
5
0.2
25

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Transformers
The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?

8,800 V
88 V
880 V
8.8 V

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