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Electrics and Transformers
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What does a step down transformer do?
Decrease the voltage
What does a step up transformer do?
Increase the voltage
Describe how a transformer works.
AC source ---> Primary Winding ---> Magnetic field ---> Secondary winding ---> AC outlet
Why do we depend on transformers to have electricity?
Voltage change is necessary for transmission and distribution lines.
What's another name for windings?
Coils
Why are coils made of aluminium or copper?
Because they are highly conductive
Will a transformer change the frequency of cycles (Hz Hertz)?
no
When current is passed through the primary and secondary windings it creates a?
magnetic field
What does EMF stand for?
electromotive force
True of False: The oil inside a transformers has different purposes. 1 is to insulate and another is to keep the transformer cool.
true
Which Transformer has more turns on the secondary winding?
step up transformer
Which Transformer has more turns on the primary winding?
step down transformer
Ns is the?
number of secondary windings
Np is the?
number of primary windings
Vs is the?
secondary voltage
Vp is the?
primary voltage
Is this the symbol for a capacitor?
no
Does a step up transformer lower the output voltage for transmission?
no
Does a step down transformer lower the output voltage for distribution?
yes
The power cables used to move electricity from the power station to the consumers distribution plant are called _____________ lines.
transmission
There are 2 types of Transformers, 1 is called a 'step down transformer' and the other one is called a?
step up transformer
The winding that feeds the load from the Transformer is called the?
secondary winding
The winding that receives the supply voltage is called?
primary winding
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