transformers (electrical)

in a transformer with a turns ratio of 5:1 ( the primary has five times the number of turns as the secondary ), what will be the voltage on the secondary if the primary voltage is 120v

24v

a dry-type transformers must be housed in a vault if rated at more than

35kv

the power factor of a circuit can be improved by increasing the

capacitance

the main purpose of a transformer is to

change the output voltage

the three basic types of iron core transformers are

closed core open core and shell

most controlled transformers are

dry type step down

one effect caused by magnetic leakage in transformers is a

lower secondary voltage

when ac flows through a transformer coil, a ______ field is generated around the coils.

magnetic

a(n) ______ should be used to measure insulation resistance

megger

what causes voltage to be induced in a transformer?

mutual induction

a symptom of a transformer with an open circuit is

no output on the secondary

if one of the transformers is damaged in a delta system, (n) ______ configurations may be used temporarily carry the load

open delta

the three parts of a basic transformer are the

primary windings secondary windings and core

the windings in an autotransformer are not isolated form one another

true

when the field from one coil cuts through the turns of a second coil,______.

voltage will be generated