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WorksheetsBlock 2 - 3A - Transformers
Total questions: 15
Worksheet time: 8mins
A transformer consists of
Metal Core
Metal core and coiled wire
Metal core and polymer wire
Polymer core and metal wire
The insulation at the transformer's core is meant
to avoid sharp edges.
to avoid corrosion.
to avoid electrical contact.
to reduce power loss.
Primary loop is connected to the supply while secondary loop is connected to the load.
True
False
Step-up transformer is a transformer that increases...
voltage.
current.
resistance.
conductance.
Transformers are represented by...
T
Trans
The Eversoft logo
TM
The requirement for relative motion makes the transformer a ___ device
AC
DC
AC/DC
EC
The build up of current in the core is called...
Eddy current loss
Ed current loss
Edd current loss
Transformers in audio/power frequency circuits have which type of core?
Laminated iron
Powered iron
Air
Iron ingot
Induction requires...
A magnetic field
Conductors
Relative motion
What is voltage ratio?
The primary voltage to secondary current
The primary voltage to secondary voltage
The primary watts to primary watts
Thr primary current to secondary current
Transformer types are classed by
Winding style
Frequency ranges
Power application
Max voltage
What happens to a three phase transformer when one phase burns out?
Gotta throw the whole thing away (if three phases are required)
Still good, keep using it
Which one is most often used in the military?
Delta-wye
Wye-delta
Wye-wye
Delta-delta
How many types of transformers are there?
6
5
7
9
What is the range for Audio Frequecy Transformers
15Hz-20kHz
50Hz-1600Hz
110V AC - 440V AC
20kHz-300GHz
