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7.4
Test Description: Transformers in Electrical
Instructions: Answer all questions to get your test result.
1) Which of the following is not a part of a transformer?
A
secondary coil
B
primary coil
C
iron core
D
load
2) What is the IEA for a transformer that has ni of 300 and no of 600?
A
900
B
0.5
C
300
D
2
3) The actual mechanical advantage of a transformer is less than the ideal mechanical advantage because of
A
current
B
resistance
C
force
D
area
4) The basic unit used to measure electrical current is the
A
volt
B
watt
C
amp
D
joule
5) If you know the specific ratio of wire turns in a transformer, you can find the
A
IMA
B
AMA
C
IEA
D
AEA
6) The ratio of power out to power in equals
A
current
B
efficiency
C
voltage
D
transmission
7) this can step up or step down voltage and current
A
conductor
B
voltmeter
C
electrical force transformer
D
multimeter
8) A transformer that decreases this is called a step down transformer
A
power
B
current
C
voltage
D
source
9) To find the amount of electric power, you multiply the voltage times the
A
transformer
B
current
C
power
D
mechanical advantage
10) Electrical transformers can step up or step down:
A
neither voltage nor current
B
both voltage and current
C
voltage only
D
current only
*select an answer for all questions
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