Transformers

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

2. The turns ratio required to match an 80 source to a 320 ohm load is

80 20 4 2

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

12V 120V 240V 2400 V

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 6250 62500

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