Understanding the Structure and Action of Transformers

The video tutorial explains the structure and function of transformers, devices that modify the potential difference of alternating current. It covers two types: step-up transformers, which increase voltage, and step-down transformers, which decrease it. The structure of transformers includes two coils around an iron core, facilitating electromagnetic induction. The video highlights that transformers only work with AC, as DC does not induce a potential difference. Finally, it discusses energy transfer between electrically isolated circuits.

What is the primary function of a step-up transformer?

• To convert alternating current to direct current

• To increase the potential difference of an alternating current

• To store electrical energy

• To decrease the potential difference of an alternating current

Which component of a transformer is responsible for being easily magnetized?

• Iron core

• Aluminum coil

• Plastic casing

• Copper wire

What is the role of the primary coil in a transformer?

• To provide mechanical support

• To store electrical energy

• To generate a magnetic field

• To convert direct current to alternating current

Why do transformers only work with alternating current?

• Because alternating current is safer

• Because direct current is too weak

• Because alternating current generates a changing magnetic field

• Because direct current is more expensive

How is energy transferred between the primary and secondary coils in a transformer?

• Through a direct electrical connection

• Via a shared magnetic field

• By converting energy to heat

• Through a mechanical linkage