Step Up and Step Down Transformers: Understanding the Differences

This video tutorial explains the differences between step up and step down transformers. It begins with an overview of transformers, which are devices that modify the potential difference of an alternating current supply. The video then details the characteristics of step up transformers, which increase potential difference, and step down transformers, which decrease it. The tutorial further explores the turns ratio equation and how it relates to the potential differences across the primary and secondary coils in both types of transformers.

What is the primary function of a transformer?

• To store electrical energy

• To increase or decrease the potential difference of an AC supply

• To convert electrical energy to mechanical energy

• To convert direct current to alternating current

In a step up transformer, how does the number of turns on the secondary coil compare to the primary coil?

• The secondary coil has the same number of turns as the primary coil

• The secondary coil has more turns than the primary coil

• The number of turns is irrelevant

• The secondary coil has fewer turns than the primary coil

What happens to the potential difference across the secondary coil in a step up transformer?

• It fluctuates

• It decreases

• It increases

• It remains the same

In a step down transformer, which coil has more turns?

• The number of turns is not a factor

• The secondary coil

• The primary coil

• Both coils have the same number of turns

What is the effect on potential difference across the secondary coil in a step down transformer?

• It decreases

• It increases

• It remains constant

• It becomes zero