Transformers

Question 1

Transformers

Answer 1

• steps up or steps down the voltage
• current in primary coil produces a magnetic field
• current is changing
• causing a changing magnetic field in the core
• core strengthens the magnetic field
• field lines interact with secondary coil
• which induces a voltage in the secondary coil
• transformer won’t work with d.c.

Question 2

Power transformer equations

Answer 2

P = I^2 x R

P (in) = P (out)