Electrical Engineering - Transformers

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Exercise : Transformers - General Questions
1.
What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV?
4 kVA
0.25 kVA
16 kVA
8 kVA
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
The turns ratio required to match an 80 source to a 320 load is
80
20
4
2
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is
12 V
120 V
240 V
2,400 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
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 ?
250
25
6,250
62,500
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is
0.2
0.4
5
25
Answer: Option
Explanation:
No answer description is available. Let's discuss.