Question

1. In which case is the transformer step-up? Explain why

2. In which case is the transformer step-down? Explain why.

3. In which case is the transformer neither low nor high? Explain why.

4. Why should a transformer have a core of ferromagnetic material?

5. What is the difference if the transformer is connected to a DC and AC voltage source?

6. What does the "Rate" value of a transformer represent

Answer 1

!.If the number of turns in the secondary coil is greater than the number of turns in the primary the out put voltage is greater than the input voltage in this case step up transformer.

2.If the number of turns in the secondary coil is less than the number of turns in the primary the out put voltage is less than the input voltage in this case step down transformer.

3. Ideal case of turns ratio is same

4 . To increase the magnetic flux through the windings we use the iron core.