Transformers Flashcards
When AC flows through a coil, an alternating magnetic field is … around the coil
Generated
If the alternating magnetic field generated by the coil cuts across the turns of a second coil an … will be generated in the second coil
EMF
The EMF generated in the second coil is called the EMF of … …
Mutual induction
The action of generating this voltage is called … …
Transformer action
In transformer action, electrical energy is … from one coil (…) to another (…) by varying the magnetic field
Transferred
Primary
Secondary
The purpose of a transformer is to … or … the value of an alternating …
Raise
Lower
Voltage
It will not work on … voltages as there is no movement in the … …
DC
magnetic field
A simple transformer consists of … … very close together but electrically insulated from one another
Two coils
What are the 2 coils called?
Primary winding
Secondary winding
What are the windings wound too?
Laminated soft iron core
What are the two types of transformer construction?
Core
She’ll
What is the principle function of a transformer?
Step-up
Or Ac Voltage
Step down
Output voltage = …. X input voltage
Number of secondary turns
Divided by
Number of primary turns
Transformers effectively … the electric shock hazard caused by an … on such equipment
Reduces
Earth
Input cables to equipment are identified as?
Red L1
Yellow L2
blue L3
