To test and expand your knowledge, take this transformers and impedance matching quiz that we have designed for you. Impedance-matching transformers are used for the purpose of matching the impedance of a source and of its load to get the most efficient transfer of energy. Isolation transformers are mostly applied for reasons of safety to separate a piece of equipment from the power source. So, learn more with these questions, and we wish you good luck.
It is easier to regulate than low voltage.
The I^2 R losses are minimized.
The electromagnetic fields are strong.
Small transformers can be used.
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23.4 V rms
585 V rms
117 V rms
2.93 kV rms
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A step-up unit.
A step-down unit.
Neither a step-up unit nor a step-down unit.
A reversible unit.
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1:380
380:1
1:19.5
19.5:1
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The toroid works at higher frequencies.
The toroid confines the magnetic flux.
The toroid can work for dc as well as for ac.
It is easier to wind the turns on a toroid.
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One phase.
Two phases.
Three phases.
Four phases.
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The primary impedance is greater than the secondary impedance.
The secondary winding is right on top of the primary.
The primary voltage is less than the secondary voltage.
All of the above are true.
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Provides maximum coupling.
Minimizes capacitance between windings.
Withstands more voltage than other winding methods.
Has windings far apart but along a common axis.
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The primary winding.
The secondary winding.
An unbalanced winding.
A balanced winding.
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9.00
3.00
1/3.00
1/9.00
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Air core
Ferromagnetic solenoid core
Ferromagnetic toroid core
Ferromagnetic pot core
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Can be adjusted automatically.
Has a center-tapped secondary.
Consists of a single tapped winding.
Is useful only for impedance matching.
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75 Ω, purely resistive
150 Ω, purely resistive
600 Ω, purely resistive
1200 Ω, purely resistive
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150 Ω, purely resistive
125 Ω, purely resistive
100 Ω, purely resistive
113 Ω, purely resistive
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